| General > General Technical Chat |
| Color blind safe web colors |
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| fourfathom:
I know you've chosen, and I can easily differentiate between the red and the green (with the big areas of solid color), but FWIW I still have a difficult time reading the black "Speaker" text on the red background. and a "lighter" red or fatter text would help with this. But I can read it as is, if necessary, and I'm used to it. |
| PlainName:
I think the colours get lost in the design whatever they are and whoever perceives them. The bars are all the same length and with three colours on four bars, it's not actually obvious that the colour is denoting anything other than being a different bar. (Having said that, if they all start out white and then change, that would be meaningful.) As someone else said above, non-colour indicators would help enormously. I figure you don't want the tick/cross thing, so why not make the correct answer bold, or a large font, or something that makes it stand out from the other three. |
| pardo-bsso:
Hi, these two articles might come handy: https://developer.mozilla.org/en-US/docs/Web/Accessibility/Understanding_WCAG/Perceivable/Color_contrast https://developer.mozilla.org/en-US/docs/Tools/Accessibility_inspector/Simulation |
| tom66:
We had an RGB lamp on one of our products. For showing an alarm, it would go solid red, but if it was 'all clear' it would pulse turquoise, 100% green with about 20% blue. You have two types of indication there, and the blue component further helps the user contrast the colours. |
| Siwastaja:
With high-power RGB LEDs, the green emitter typically being slightly off to cyan helps even if you don't mix in any blue. Pure green emitters are specialized and expensive, the usual options are the super inefficient old cheap yellowish green, and the modern high efficiency cyanish green, latter of which is good for the color blind, but not optimal for maximized color gamut. |
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