readability: to what extent is the blank text on a medium to light gray background objectively a bad practice?

I made the mistake of openly criticizing a web page because they asked me for an opinion. I ruled negatively. To what extent is the designer guilty of my unfavorable criticism?

Legibility judged objectively?

Here intrinsic and external factors intervene, such as monitors and eyes.

The small text, from 8 to 10px, white, in a solid tone of gray, which is somewhere between 10 and 35%, still made me fall a "star" … probably because the LCD helped me. The viewing angle of the screen, the density of pixels, maybe even the reflection of the screen could have influenced me. However, am I to blame or is this supposed to be avoided?

Since I have a slight astigmatism, I should not appreciate small sources that are too thin or light. But actually I use this configuration at this time for my desktop environment, with supbixel processing enabled as a necessity to render the font correctly, it is very thin. I'm not blind

Is it sustainable that one should not have to weigh such external factors, if one adheres to good practices, as a greater contrast between the text and the fund?

There was also no real need to choose such a clear gray. What finally gave me the impression of being careless, while the author could have tried to keep things warm and cozy with his choice of colors.

Relevance issues

The thing is that the user is not reading a poem with this configuration. I'm talking about the menu items that will only be read really until the user learns instinctively in the third word of the row.

Personally, I think readability is important. But good practices are not rules and I can not penalize the author because he violated Article X. Is this still somehow objectively A misstep from a UX perspective or is it rather that I was prone to simply "finding fault" subjectively, frustrated by not being able to read some words at a glance? To what extent is the white text on a light gray background objectively a bad practice?

Bonus question in the same line:

This menu was also hidden unnecessarily from the view, until it was invoked by a click. This superfluity made me fall another star, since it gets in the way of efficient interaction. Except, it's just an additional click. However, making a furore in the dynamics for the sake of having dynamics can be done without getting in the way.

The same question. Did I hold a valid resentment? Should the author get it or rather be offended?

Android: webview shows the blank screen a few times when opening pdf in google doc

I am using webview in a snippet to view PDF online using The PDF file has many photos and table. Load the PDF perfectly. But sometimes it shows blank screen. I added the following code.

webView.getSettings (). setAllowFileAccessFromFileURLs (true);
webView.getSettings (). setAllowUniversalAccessFromFileURLs (true);

After adding this, I can not recreate the problem. But the two previous lines are not compatible in playstore. I have tried all the
Link1 to this problem. Mainly I see the blank screen on devices with API> 23. Please help to solve this problem.

Pathfinder – Does Mind Blank also protect your equipment?

Does Mind Blank protect the magical objects or even the normal equipment that is in the Mind Blanked objective of the divination spells? (including but not limited to Detect Magic, Locate Object, etc.)

Another player and I do not currently agree on this, I thought that Mind Blank would also protect my things, but he is telling me that what he should use is non-detection and his reason for that is some text at the end of the non-detection that's not in the Blank Mind spell and that line is,

"If it is cast on a creature, the lack of detection protects the creature's equipment as well as the creature itself."

The reason why I did not bring this question to the GM is still because he is in blocking mode for his exams now and can not be contacted yet.

If the majority answer is "Yes, it also protects your team", could you put the reasoning in the answer too? Then, when the DJ is free, I can take him and the other player before the game so that it does not become a debate at the table.

Thanks for your time: D

matrices – the output file is blank

I do not know why the following code generates a blank file. I am running Windows 8. I received help from this community for previous help from Perl and this is just what I could put together with the help I received. However, I can not figure out where this script goes wrong.

strict use
use warnings;
use HTML :: FormatText;
use LWP :: Simple;

my $ dateField = & # 39; date = 2018-12-31 & # 39 ;;
my $ currency = "USD";
my $ filename = & # 39; C:  Users  Name  Desktop  doc3.txt & # 39 ;;
my $ address = "$currency.csv?api_key=gpolonsky&decimal_places=4&$dateField&fields=averages&quote ProspPpp. CNY and quote = DKK and quote = HKD and quote = INR and quote = IDR and quote = ILS and quote = JPY and quote = MXN & quote = NOK and quote = PLN and quote = PLN and quote: Gp. AED & quote = CLP & quote = EGP & quote = MAD & quote = NGN & quote = OMR & quote = QAR ";
my $ content = get ($ address);

my $ s = 1;

define $ content or die "Unable to read & # 39; $ address & # 39 ;: $!";
$ content = ~ s / ^[^n]*  n // s;

$ content = ~ s / ^ / 20181231, / gm; # The m option causes ^ to match at the beginning of each line

$ content = ~ s /, 2018-12-3[0-9]T[0-9][0-9]:[0-9][0-9]:[0-9][0-9] +0000 * // g;

$ content = ~ s / ([A-Z][A-Z][A-Z])[0-9]* .[0-9][0-9][0-9][0-9]/ $ 1 / g;

my $ string = HTML :: FormatText-> format_string
$ content,
left margin => 0,
right margin => 23,

open (my $ file, & # 39 ;, & # 39 ;, file name) or die $!;
print $ file $ string;


my data;
my $ infile = & # 39; C:  Users  Name  Desktop  doc3.txt & # 39 ;;
my $ outfile = & # 39; file2.txt & # 39 ;;

open (my $ in, "<", $ infile) || die "can not open $ infile file";

while (mi $ linea = <$in>) {
push (@ {$ data {(split & # 39;, & # 39 ;, $ line)[2]}}, $ line);


print $ infile;
close $ in;

open (my $ exit, ">", $ outfile) || die "can not open file $ outfile";
foreach my $ curr (@curOrd) {
foreach my $ line (@ {$ data {$ curr}}) {
print $ out $ line;

close $ out; `` `

lion – 2011 iMac 27 ": can not upgrade to the latest version of OSX after replacing the defective drive with a new blank hard drive.

You installed a new hard drive in an iMac 2011 27 ": the old drive would not start (node ​​errors that FSK can not fix) This defective drive was running High Sierra before it stopped the boot.

The old unit was removed and installed in a cabinet with external power.

  1. A new hard drive was installed, but OSX's remote installation was limited to Lion (10.7), since Apple's remote recovery only reinstalls the original OSX it came with.

  2. I can not find any way to find the recovery partition in the old unit.

  3. I tried to update OSX from the application store, but my account's purchase list does not show any OSX (although many of my applications)

  4. I can not see the settings in the Apple app store account as "To make changes to the payment information, you must update your Mac to the latest version of macOS." (That's what I'm trying to do!)

  5. I tried to download El Capitan from the large Apple page configured for this, but clicking "Get" says that Paypal will send me a text message to confirm the account, but that was more than a day ago.

  6. It was also resolved how to use the terminal (fsck_hfs -r / dev / disk1s2) to try to rebuild the catalog in the external enclosure now connected to the old unit. It says that it can not be verified after executing the command.

My question: How can I update the operating system, when I can not access the app store or the Apple app store account, or find the recovery partition on what is now the external drive, and I can not get a CD with the operating system?

Even if I could find the recovery partition, I can not see any information on how to use other than starting the external disk in the destination disk mode? (that will not work since it will not start)

Running out of options … thanks in advance, good people.

The best thing I can think of is to find some way to copy the recovery partition from the old drive to the new one (since I can read the previous disk), but where is the partition?


Python scrapy strip blank space answer

I'm trying to delete blank spaces in my scrapy script but it says that the object has no strip attribute

import scrapy

GamesSpider class (scrapy.Spider):
name = "games"
start_urls = [

    def parse (auto, answer):
for the game in response.css (& # 39; ol # products-list li.item & # 39;):
performance {
& # 39 ;: game.css (& # 39; h2.product-name a :: text & # 39;). extract_first (). strip (),
& # 39; age & # 39 ;: game.css (& # 39 ;. list-price ul li: nth-child (1) :: text & # 39;). extract_first (),
& # 39 ;: players.css (& # 39 ;. list-price ul li: nth-child (2) :: text & # 39;). extract_first (),
& # 39; duration & # 39 ;: game.css (& # 39 ;. list-price ul li: nth-child (3) :: text & # 39;). extract_first (),
& # 39 ;: game.css (& # 39 ;. list-price ul li: nth-child (4) :: text & # 39;). extract_first ()

graphic user interface design: accessibility of color palette for blank text button labels


I am currently working to try to incorporate text accessibility into the visual design of a suite of SaaS products, which has primary cross product and product feedback colors and a variety of product specific accent / secondary colors. Because we are SaaS, for our customers, we also allow them to select brand colors that are used for certain elements in the pages configured by the customer that are shown to the end users.

One of those brand elements are our action buttons and some page banners, so to make sure we maintain accessibility, we use blank text and only allow customers to choose brand colors that have a contrast high enough to achieve a contrast ratio of 1: 4.5. Therefore, the white text is a restriction here.

We also use the angular material as the basis for our own components, and for the accessibility of the text, they do what Google's material does, which is simply to automate the use of white or black text with a certain transparency, according to the hexagon used. for the container. Always maintain a minimum contrast ratio of 1: 4.5.

But If we did that, we will use white text for some buttons in parts of the user interface that are agnostic of the client's brand. [e.g. a client dashboard that shows multiple clients] and, potentially, use white or black text for other buttons that are branding elements for the specific parts of the client's user interface [the client specific pages, where a client company can configure custom content for their end-users and where we’d show brand colors]. So white labels have to be one thing.

My current fight

So with those limitations in mind, my current struggle is trying to find a new primary blue that works with white text. This is our primary agnostic color for the client, which is canceled with the use of a brand color.

Our current hex is 3E99D8 (HSL 204.5 °, 66.4, 54.5), which is fine for use with large-scale text, since the contrast with white is 3.1, but obviously we do not want to use action buttons with 24px / 18pt not in bold or ~ 19px / 14 pt text sizes in bold, since our body copy is a regular font of 16px / 12pt.

In a similar way, for our market, we need that this primary color is still blue, given our vertical / matter / marketing / etc.

Note: I am using HSL while exploring alternatives only because it is easier to work with, although RGBA would give me more colors to choose from.

Exploring Alternative Colors

So, so far, I have tried to increase the saturation, since 3E99D8 is not 100% saturation, but that does not help to increase the contrast with the white text. If I increase the saturation, I have to decrease the luminosity, but if I decrease the saturation, the color becomes more gray than blue, since when changing the saturation only the amount of tone in the color is added or subtracted, which effectively means that & # 39; m similarly, add or subtract equal amounts of black and white in color.

I can increase the contrast easily by making the 3E99D8 darker, going from a brightness value of .55 to a brightness value of .43, which gives me the # 257bb7. However, there have been some comments that this is a blue too dark and too different.

So, finally, I've tried using different hue values ​​completely, but because of that, it makes finding a solid threshold for brightness and saturation values ​​problematic, since a different hue will have its own minimum saturation values ​​and slightly different brightness to meet. a minimum contrast of 4.5.

This also means that changing any other color in our color palette to make it accessible also becomes problematic, since there is no way to easily maintain a constant perceived brightness throughout the palette, since different shades with the same perceived brightness may have a saturation and a luminosity very different values.

From some experiments with Colorable, I discover that the tones closest to the pure blue (H = 240) can have a higher value of luminosity and a lower saturation and still achieve the minimum contrast, but the blues are closer to the pure green (H = 120), they have to be darker and less saturated for adequate contrast.

I am limited by reducing saturation in any way, since below 50% saturation, the color becomes more gray than blue, but at 100% saturation, I have to maintain a darker luminosity value, since the color it becomes much brighter, and obviously it has to keep the luminosity below 60%, since any lighter element is too white to maintain the minimum contrast. So, at this point, I'm somewhat blocked when it comes to finding a new blue that is close to 3E99D8 but still accessible with white text.

So, now for my questions:

  1. Can someone explain in simple terms why pure green and pure blue (values ​​of 120 and 240 shades, 100% saturation, 50% brightness) have different contrast ratios with white, especially if white is supposed to It is composed of equal amounts of blue, green, and red?
  2. How can I proceed with the systematic attempt to find a blue close to 3E99D8 that has contrast with the white text, but is not drastically different?
  3. How could I improve or worsen this exploration if I try to use another color model? Is it even possible to systematically explore this with other color models?
  4. Is this exaggeration completely and should I push for # 257bb7 to become our new primary blue?

The phone shows a blank blue screen and turns off after turning it on

I have a Xiaomi RedMi Note 1. When I turn it on, it shows a blank blue screen and turns off later. I tried to open the full reset menu, but it shows the blue screen and goes off again. I tried to remove the battery and try again. What should I do to fix it? I do not know much about phones, but is this known as the blue screen of death? The android version is 5.0 lollipop.

Power management: blank screen without turning off the screen

Recently, I exchanged my raspberry pi for an intelligence core for a project PC. The PC is connected to the TV screen.

In the raspberry I could edit /boot/config.txt with a comment hdmi_blanking = 0 -> The HDMI output will be blank instead of being disabled here.

With this configuration I was able to erase the TV screen in total with

xset -display: 0 set s activate

or even with

xset -display 0 dpms force


when now I run the xset -display 0 dpms force the HDMI port is deactivated and the TV screen shows the "signal lost on HDMI1" …
So my solution at this moment is:

xsetroot -display: 0 -solid & # 39; # 000000 & # 39;

xset -display: 0 s noblank

xset -display: 0 s activate

are these comments when I leave the configuration s to delete the signal, it will be lost again, that's why I have it configured for noblank.

The result is that the screen turns black but still has the backlight turned on. In RPI with the dpms force and the adapted configuration file would turn off the backlight, which is important for my situation.

Does anyone have any ideas? I'm running Ubuntu 18.04 with kernel 4.19.9

html – The css generates a blank space after the footer

I need to resolve this as soon as possible ..
In my html document, a blank space is generated after the footer (I did not like it).
My code at the bottom of the page is:


footer {

background color: # 362f2d;
Typographic family: "Roboto", sans-serif;
White color;
font size: 20 px;
relative position;
width: 1280px;
Height: 200px;
superior: 500px;


footer p

Typographic family: "Anton", sans-serif;
White color;
Font size: 24px; 

-moz-transformed: matrix (1.01718591344153,0,0,1.00223265981481,0,0);

-webkit-transform: matrix (1.01718591344153,0,0,1.00223265981481,0,0);

-ms-transform: matrix (1.01718591344153,0,0,1.00223265981481,0,0);

relative position;
left margin: 200px;
superior: 10px; 


footer ul {
type of list style: none;


.column1 {
relative position;
left margin: 200px;
.column1 img {
width: 100px;
height: auto;

.column2 {

relative position;
left margin: 300px;
up: -120px; 


.column2 img {

width: 100px;
height: auto;


.local {

relative position;
left margin: 320px;
up: -270px; 


.I will say {

Typographic family: "Roboto", sans-serif;
Font size: 16px;
White color; 


.Red {

relative position;
left margin: 360px;

up: -90px;


.red1 {

relative position; 

left margin: 540px;

up: -80px;


.red1 img {

width: 45px;
height: auto; 


red 2 {

relative position; 

left margin: 590px;

up: -180px;


.red2 img {

width: 45px;
height: auto; 


And my HTML is:
html code