RFR: JDK-8292276 : Missing color names in CSS. [v12]

[ScientificWare]

> This is referenced in Java Bug Database as
> - [JDK-8292276 : Missing color names in CSS](https://bugs.java.com/bugdatabase/view_bug.do?bug_id=8292276)
> 
> This is tracked in JBS as 
> - [JDK-8292276 : Missing color names in CSS](https://bugs.openjdk.java.net/browse/JDK-8292276)
> 
> Adds missing color names, defined by CSS Level 4, in CSS.java :
> CSS Color Module Level 4
> W3C Candidate Recommendation Snapshot, 5 July 2022
> [7.1 Named Colors](https://www.w3.org/TR/css-color-4/#named-color)
> 
> Designed from : [ScientificWare JDK-8292276 : Missing color names in CSS](https://github.com/scientificware/jdk/issues/12)

ScientificWare has updated the pull request incrementally with one additional commit since the last revision:

  Null value - Opaque color declaration 
  
  Fixes handling of null argument and simplifies opaque color declarations.

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/9825/files
  - new: https://git.openjdk.org/jdk/pull/9825/files/05ec5d32..1f501bc6

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=9825&range=11
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=9825&range=10-11

  Stats: 152 lines in 1 file changed: 2 ins; 1 del; 149 mod
  Patch: https://git.openjdk.org/jdk/pull/9825.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/9825/head:pull/9825

PR: https://git.openjdk.org/jdk/pull/9825