New answers tagged css
This blog post provides a downloadable pdf with colors and their code numbers. It also provides suggestions for readable color palettes. http://www.dmcinfo.com/latest-thinking/blog/id/8840/simplifying-ui-and-ux-design-with-color-cheat-sheet
A few rules of thumb: I recommended providing at least two themes - dark on light and light on dark as some users may not be able to read one of the two. For light on dark, make sure the contrast isn't too high (e.g. use grey on black, not white on black). Make sure the contrast between the intensity of foreground and the intensity of the background is ...
If you want to consider users with special visual and/or cognitive requirements, it becomes quite complicated and there's no single answer. The W3C Web Accessibility Initiative's Web Content Authoring Guidelines (WCAG) provide a good starting point. That's probably the single most thoroughly-researched resource on web accessibility, though it's not totally ...
I know a lot of people may scoff at the idea, but take a look at Twitter bootstrap for a guide. A lot of time and resources have been put into that project to make the defaults sensible and readable across multiple devices.
If you are not concerned about beauty/ugliness just try to imitate the Windows High Contrast colour schemes.
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