Port old tests on HTML legacy color attribute parsing

[zcorpan]

https://simon.html5.org/test/html/rendering/color-attributes/ has tests for https://html.spec.whatwg.org/multipage/common-microsyntaxes.html#rules-for-parsing-a-legacy-colour-value

As far as I can tell, there are no tests for this in wpt.

Likely the tests don't quite match with the current spec. But they do reveal that there are some differences between Gecko and WebKit/Blink.

[Alam9835]

Hello, Can you please assign me this issue.

[Alam9835]

can u please elaborate more about the issue I will be very thankful

[zcorpan]

The tests should be added to this repository (in html/infrastructure/common-microsyntaxes/rules-for-parsing-a-legacy-colour-value/), and converted to use testharness.js. See https://web-platform-tests.org/writing-tests/testharness-tutorial.html

[Nidhi2003]

please assign me this issue

[zcorpan]

Submit a draft PR when you have a work in progress fix. :)

[Harsh-0077]

can i work on it assign please

[zcorpan]

Anyone can work on it, see previous comments :)