Questions tagged [contrast]
is the difference in luminance and/or color that makes an object (or its representation in an image or display) distinguishable.
72
questions
2
votes
1answer
132 views
Using text-shadow for accessibility
I'm interested in understanding whether there has been any research or confirmed values for using the text-shadow property with the goal of meeting WCAG minimum colour contrast values.
In my ...
26
votes
8answers
6k views
Color picker - what to do if the user selects the same color as the background?
I am working on a app that has an area dedicated to color choosing, like so:
Now, ordinarily, this works fine, but what if the user chooses the same color as the background color? It would look like ...
2
votes
1answer
170 views
Image comparison sliders and visual accessibility
I am creating an image slider for a site, and I am confused on how to successfully meet wcag requirements. Below is an example that conveys the idea of what I am creating.
I have read a couple ...
5
votes
1answer
181 views
Why do many prominent web apps use blue primary button with white text, when it fails the WCAG 2.1 contrast threshold
WCAG 2.1 says to have a minimum contrast ratio of 4.5:1, but blue primary buttons of Twitter, Figma and Outlook have white text which fails to cross the threshold ratio. Is there another scientific ...
0
votes
1answer
46 views
Is 200% browser enlarge an alternative for colors with contrast less than 4,51:1?
I have a website that has font size for body 14px. All the colors have contrast ratio of 3:1.
wgac 2.1 states that normal fonts should have a ratio of 4,51. But if the user zooms in the site, normal ...
3
votes
2answers
180 views
What is the number 0.05 in the calculation of contrast ratio between colors?
To calculate contrast ratio the following formula is used (source):
(L1 + 0.05) / (L2 + 0.05)
where:
L1 is the relative luminance of the lighter of the colors, and
L2 is the relative luminance of ...
4
votes
2answers
95 views
Statistics (or tools) on screen calibration & readability
Fairly straight forward question, but I could not find any answers to it. Are there any known statistics regarding screen calibration & readability?
Are there any colors to avoid where screen ...
1
vote
2answers
98 views
Contrast of a message box
I'm in the middle of updating the colours of our app and making them as consistent as possible, but also trying to bring them in line with the WCAG AA rating for contrast.
One area I'm unsure if I ...
1
vote
1answer
108 views
Color contrast too low, but element good visible
I am checking a software against the software ergonomic requirements of WCAG 2.1 Level AA. On part is the colour contrast, which must be for graphics 3.0:1. In the following graphic the orange part is ...
1
vote
4answers
167 views
Legibility and contrast for light weight sources. Regarding accessibility
I am developing a web application, starting from an approved design, I have the task of evaluating if it is readable.
The question is: the light body, modifies the consideration over the contrast? ...
1
vote
1answer
120 views
Practical 'lightest' shade of grey for contrast with white
I often use a light shade of grey such as rgb(242,242,242) in my designs to provide a subtle contrast to white, e.g. for the background of alternating rows in a table.
I can easily distinguish ...
1
vote
1answer
587 views
WCAG 2.1 contrast issue for Google/Angular Material Design
I'm relatively new to accessibility compliance, but my research has found a confusing anomaly: The Angular Material buttons, links, etc are apparently WCAG compliant, yet do not seem to have the ...
1
vote
2answers
278 views
Is there a standard for indicating a high contrast style? [closed]
I am working on a web app and have developed both a normal stylesheet and a secondary high contrast stylesheet. I am coming unstuck when it comes to allowing a user to switch between styles.
Is ...
1
vote
1answer
156 views
What is the procedure for measuring color contrast around anti-aliasing?
What is the proper method for measuring the color contrast of on-screen elements that are anti-aliased (particularly, but not limited to, text)? Does a standard method even exist?
Here's my specific ...
14
votes
3answers
2k views
Maximum contrast ratio for good accessibility
So we are remaking an enterprise app from scratch. This time we want to base our design decisions on proper research.
Our users use the app 24/7 with high requirements for UX. So our main goal is to ...
0
votes
1answer
53 views
How to force the user to draw on certain elements if there are images in the layout
Well, I ran into the problem of distinguishability of content in a mobile application. In fact, there are a huge number of pictures on the page (movie poster, preview of the film as a picture). A lot ...
3
votes
4answers
1k views
Looking for research regarding pure black vs dark gray for readability
I've heard people say that websites with pure black text on a white background can cause exhaustion when reading, and that it's better to use a very dark gray text or a light gray background color to ...
0
votes
1answer
115 views
Colors VS Screens - Colors to avoid
I'm working on my personal webpage, my primary background color (apart from white) is straight-forward turquoise (#40e0d0) from the styles selection in my navigator.
On my laptop, the color is more ...
4
votes
4answers
378 views
WCAG 2.0 color contrast - How strict do you need to follow?
I have some buttons with a purple background and I am trying to set the text color so it is in compliance of the WCAG 2.0 color contrast rules.
My issue is that I just don't understand how based on ...
1
vote
1answer
88 views
Color contrast for graphics
I'm trying to find information about minimum contrast ratio between graphic elements (e.g. a bar-graph and its background) but I can't seem to find any. Are there any good practices?
WCAG 2.0 ...
2
votes
2answers
308 views
Text contrast for highly saturated call to action buttons
It's become a part of my way of working that I check areas of my design are adhering to accessibility guidelines, WCAG2.0 colour contrast in particular.
At the moment I'm working on creating a new ...
10
votes
2answers
459 views
Mostly white screen (8 hours per day)
I am using an application which has a white background color.
I am using this application 8 hours per day.
I think a GUI with less contrast would be better for my eyes. I guess this would save some ...
5
votes
1answer
1k views
Contrast ratio for button background color?
I am working with making a website WCAG II compliant. The designers are asking to use yellow buttons (specifically, #fcdb31) with blue text on top of them on white backgrounds.
While the blue type on ...
1
vote
2answers
105 views
Play & Stop VS Start & Stop for meditation app
I'm working on a mobile app and deciding about whether to change the name of the button from play to start. This controls the circle as shown below.
At the moment it's play and stop but do you think ...
4
votes
2answers
1k views
High contrast/visible colors for google maps
I am creating some custom markers for an application that uses google maps
They stand for a tow truck and a broken car.
An important constraint is that they must contrast with the map bellow, in ...
11
votes
4answers
5k views
What should a well-designed high contrast function do?
I want to make my website accessible for nearly everyone. I already have a function to increase font-size. Now I am doing the high contrast function.
However, how should such an interface for ...
2
votes
2answers
2k views
Button passes contrast test however button's background and div's background are low contrast
I have been going back and forth with design about this. I think there should be a contrast with the button and the div that holds the button, however, design says there is no rule about that. I try ...
29
votes
2answers
17k views
Formula for color contrast between text and background
In my Android app a user can choose the color of an item. This color is then shown in background with a text on it. I want to display the text either in black or white - depending on the background ...
0
votes
1answer
122 views
Looking for Friendly Documentation on Color Contrast and Readability
We're looking to launch a new version of a website, and we had multiple users concerned about readability with grey text on a grey background.
I did some basic search, and found this website. Using ...
0
votes
2answers
160 views
what is the purpose of using Color Contrast Tool?
what is the purpose of using Color Contrast Tool? It's just background and text checking or icon checking?
0
votes
1answer
329 views
Is it enough to create an "accessible mode" of a website to be compliant with AA Accessibility level
I have a website, with an accessibility menu that allows the user to change the contrast level of the colors in the page in order to be compliant with accessibility level AA
Does anybody know by ...
10
votes
2answers
2k views
Material Design - text colors don't maximize contrast
Description
The color palette for Material Design specifies hues as well as suitable colored (white/black) text to be used for each backing-hue. So for example in the Red palette there are 10 '...
4
votes
3answers
119 views
Dynamic mobile styling based on the lighting of the users environment
Would it be useful to come up with a dynamic mobile styling feature based on the lighting of the users environment. Similar to how the imac reduces its brightness if you cover the cam on top of the ...
1
vote
2answers
150 views
Internet Plans table - Differentiate by speed Units
I have this administrator section in my online Internet Service Provider management system where he can insert new Internet plans, edit and visualize existing ones.
Here is a simple example using ...
24
votes
2answers
3k views
Do Samsung's Marshmallow skin Quick toggles have enough contrast?
I recently updated to Marshmallow, and I'm not happy with the blue over white scheme in daylight conditions. My question is if it's just me, or if this is documented and studied somewhere?
If so, how ...
5
votes
4answers
235 views
Is there a standard color list to keep adding new colors to a plot while retaining old colors?
My users pick one or more data sets to graph on a single canvas. The sets are color coded to distinguish between sets (all screenshots are for demonstrative purposes from demo utility):
BLUE=...
1
vote
3answers
558 views
Less contrast of text cursor over dark input box
We all know dark UI looks damn sexy. The problem is that, when the pointer hovers over a dark input box, the default black cursor has low contrast. Since this could confuse users, what might be the ...
1
vote
1answer
313 views
How to find an accessible color by changing lightness only?
Is the following hypothesis true?
For any given color:
{ Hue, Saturation, Lightness_1 }
there exists:
Lightness_2
such that the contrast ratio between:
{ Hue, Saturation, Lightness_1 }
and
{ ...
46
votes
3answers
29k views
Do disabled buttons still need to be contrast compliant for accessibility?
Very related to this question: Accessible Disabled State but that is about how to style disabled buttons to make them accessibility compliant, but my question is slightly different.
Is it actually an ...
1
vote
1answer
115 views
What are the benefits and costs of a high contrast interface in a clinical app?
I have a project in which users will take a test involving varying shapes and angles. The purpose of the test is to assess their cognitive abilities. Users will be taking this test on a tablet which ...
24
votes
3answers
4k views
Should I switch to a dark theme UI if the app is used at night?
Should I dynamically change the theming of my application based on ambient lighting?
My app will be used in bright daylight, as well as in a dark movie theatre, or may be opened at night. I ...
3
votes
1answer
151 views
UX principles for maximizing web page visibility at a distance?
This post is about maximizing visual clarity of a page, not SEO.
Some info about my project:
The page will be displayed on a 1080p 42" television.
Users will be standing 3 - 6 feet from the TV.
...
0
votes
2answers
560 views
Simulating how an app would look on various Projectors
I've done a few google searches and not coming up with anything useful:
I was wondering if anyone knew of any software or techniques that you could use to simulate how a web application would look on ...
6
votes
2answers
6k views
What is the best way to display disabled field and text for accessibility color contrast support
I am working on a project which needs to support color contrast accessibility.
Currently on our system disabled data is presented as grayed-out, but now we need to support color contrast for ...
0
votes
1answer
513 views
Mobile grid views - which style is preferred by users - rounded corners with borders or rectangles? [closed]
Is there's a way in which users of mobile devices prefer to perceive grid view content?
I'm a mobile developer and stare at mobile interfaces quite a lot. One of the things that was bothering me for ...
0
votes
1answer
1k views
UI colour palette for outdoor or bright lights
There was a requirement from the client about designing an interface with colours that are easy to read and use when users are roaming agents that are either out in the field or in environments with ...
2
votes
3answers
4k views
Color Contrast Tools as part of Website [closed]
Recently, I went to a website that had some color contrast changing tools on it and tried to find them so I could add them to sites we have in development. Obviously, I failed because I am here now ...
9
votes
3answers
1k views
Is there any way to simulate an off-angle LCD monitor for testing?
I notice that some LCD monitors, especially on laptop computers, have extraordinarily low contrast between light blue and white when viewed from "above" the screen. Even on my home desktop computer I ...
0
votes
1answer
91 views
How do display hardware contrast settings affect color contrast?
I have been interested in finding the results for this, but I have yet to find a reliable source for the following:
Given that hex color #FF0000 might look more like #FF3333 on a screen with a higher ...
1
vote
2answers
156 views
Is there any science way to find out the suitable contrast for text and background colour?
Here is the four text with different level of grey:
As you can see, the first line is very difficult to read, and the last one is the best to read. So, is there any science number behind this ...
