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Editorial Team
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Asked: 2026-05-21T10:51:38+00:00

What does the following values mean below? screen and (color-index: 256) //value 1 screen,

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What does the following values mean below?

screen and (color-index: 256) //value 1
screen, (color-index: 256) //value 2
(color-index: 256) //value 3
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  1. Editorial Team

    Value 3 is the simplest one: (color-index: 256) matches any device with 256 colors.

    Value 1 combines that with the more common screen medium, so you’re only matching screens with 256 colors (as opposed to, say, audio readers where “256 colors” is a nonsensical thing to look for anyway).

    And Value 2 has a comma, which is recognizable from other aspects of CSS. We might write p, h1 { color: purple; } indicating that if an element is either a p OR an h1 the rule applies. Here it’s a device that’s a screen or has 256 colors.

    You may find https://developer.mozilla.org/En/CSS/Media_queries instructive.

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