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Compatibility table – Colour module

CSS3 Colour properties

Property	Presto 2.1	Presto 2.2 +	WebKit 3	Gecko 1.9	Trident
color*	Yes	Yes	Yes	Yes	Yes
opacity	Yes	Yes	Yes	Yes	No

CSS3 Colour Units

Unit	Presto 2.1	Presto 2.2 +	WebKit 3	Gecko 1.9	Trident
HTML Colour keywords	Yes	Yes	Yes	Yes	Yes
SVG Colour keywords	Yes	Yes	Yes	Yes	Yes‡
RGB	Yes	Yes	Yesâ€	Yes	Yes
RGBA	No	Yes	Yesâ€	Yes	No
HSL	Yes	Yes	Yes	Yes	No
HSLA	No	Yes	Yes	Yes	No
transparent	Yes**	Yes	Yes	Yes	Yes**
currentColor	Yes	Yes	No	Yes	No

Browsers and Rendering engines

Each property and unit was tested in the latest version of each of the major rendering engines – Presto Core-2, WebKit, Gecko and Trident. KHTML wasn’t tested as they are working on transitioning to WebKit. The browsers used in the charts above were as follows:

Presto 2.1

Tested using Opera 9.5 final

Presto 2.2

Tested using Opera 10 alpha

WebKit

Tested using Safari 3 final

Gecko 1.9

Tested using Firefox 3 beta

Trident

With the absence of public builds, Trident was tested using the shipping version of IE7

Testing procedure

The browsers above were tested with tests from various sources including examples and previews on this site, and David Baron’s css3-color Conformance Test Suite.

Notes

• * Check the second table for units accepted for the various engines for the color property
• † WebKit incorrectly accepts a mixture of integers and percentages for RGB and RGBA
• ‡ Trident doesn’t support the grey keyword
• ** transparent is supported, but only in the CSS2.1 context