is the difference in luminance and/or color that makes an object (or its representation in an image or display) distinguishable.

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0
votes
2answers
53 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 ...
7
votes
5answers
2k views

Is high contrast mode really useful?

In most operating systems and on some websites there is a high contrast mode, intended for use by visually impaired people. I have doubts, however, whether using such mode makes any sense - from what ...
4
votes
1answer
135 views

How much darker should yellow be get the same contrast as other colors?

By how much should the color yellow be darkened to get the same contrast values as other colors displayed on a computer screen? This is something that i would do by sight, but i was wondering if ...
2
votes
2answers
252 views

Studies about negative readability

I've been requested to design a dark interface which spreads a little light as possible. I'm interested in academic studies / researches about white text on black background. Is it really tough to ...
1
vote
1answer
115 views

How to interpret wcag2.0 guidelines on contrast for buttons and icons

The accessibility guidelines from the W3C offer neat and usable guidelines for creating text that is readable for everyone. There are a number of very useful tools for checking contrast levels, so ...
4
votes
1answer
53 views

How much does vision change as we age?

I'd like to share with my web design team some specific, quantitative data on just how much visual ability changes, even as young as 40 years old. This is to help drive home the need for adequate ...
34
votes
11answers
7k views

What are the negative and positive aspects of dark color scheme?

I am using Light-on-dark color scheme (dark background with light text) in my application. My question is, what are the negative and positive aspects of this color scheme and why this color scheme ...
9
votes
4answers
492 views

automatically calculate contrast

A user can change the default design of his site by selecting a color. This color is applied to the menu background color. The problem is that I have to change the menu text color depending on the ...
5
votes
2answers
183 views

What is the validity of contrast and colours tests?

I just ran a contrast and colour test (using checkmycolours.com in this case) on our corporate site (www.dotblue.net; if you care) and it reports quite some failures. However, I explicitly optimized ...
1
vote
4answers
259 views

Is this contrast readable?

On this oh-so-slowly-developing page, there is the column headed "Bid x Ask", which reflects the numbers of bids and offers on the stock option in the row: Are the numbers here readable? How can I ...
4
votes
4answers
491 views

Best Way to Darken a Color Until it is Readable?

What's the best way to darken a color until it is readable? I have a series of titles which have an associated color, but some of these colors are very light and any text drawn in them is unreadable. ...
6
votes
2answers
448 views

Stressless user experience for data entry forms

We're currently discussing a redesign of the applications we develop for internal use. Now, to change things for the better, we'd like to make as many UX considerations as possible before we go ahead. ...
7
votes
4answers
2k views

Choosing high contrast text color (in relation to background color) dynamically

My application has an area with some number of controls. Each control's background color expresses a state of some sort. The controls are also numbered via some text in their foreground. For ...
11
votes
3answers
107 views

What screen contrast should a design be optimised for?

I'm in the process of working with our designers to come up with a graphical treatment for a comparison results table. We will produce a design, and then receive feedback from the business that they ...
6
votes
5answers
406 views

link color contrast with non-link text

I have read a lot about color contrast with regard to the text and background color (snook's tool), however is there a similar tool for validating the contrast of linked and non-linked text? There is ...
2
votes
2answers
1k views

What is the difference between WCAG 2 AAA Compliant and WCAG 2 AA Compliant

I use a web app to check my site color contrast. Most of my color (Back/fore ground colors) are OK and I see YES inside textboxes except the one which refers to WCAG 2 AAA. What is it? What is the ...
10
votes
3answers
617 views

Choosing colors for a subtle UI

I'm currently agonizing over how light I can make various colors in my UI before I adversely affect usability. The reason for the agonizing is that different monitors have different responses. Those ...
5
votes
2answers
350 views

Standards for and measuring contrast of solid color fills

There are several questions on UX (e.g. here, here, here) already about contrast. However, all of those are about text, and the contrast between text and background, most off them referencing this W3 ...
14
votes
3answers
2k views

How many visually distinct colors can accurately be associated with a separated legend in a figure?

For charts and graphs it's a relatively common question by programmers to want to procedurally generate an arbitrary number of colors that are visually distinct. Various research (or educated ...
4
votes
2answers
1k views

Tablet interface design when used outdoors - handling bright light

I have a line-of-business tablet application that is used outdoors day and night in a vehicle. One of the users recently provided feedback that they find it difficult to read the screen when wearing ...
5
votes
2answers
115 views

Is it good practice to have a change contrast or higher contrast buttons for users?

Is it good practice to have a change contrast or higher contrast buttons for users? As depending on the vision problem users may need different contrast conditions for comfortable reading. Some sites ...