Stylelint: Apply color rules (#42920)

* Undisable color rules

* Fix color-hex-length

* color → hex (white, black, green, red)

white → #fff
black → #000
green → #008000
red → #ff2c2c

* color → hex (the rest)

aliceblue → #f0f8ff
blue → #00f
darkblue → #00008b
fuchsia → #f0f
gray → #808080
grey → #808080
lavender → #e6e6fa
lightgrey → #d3d3d3
orange → #ffa500

* Add changelogs

* Use proper red (#ff2c2c → #f00)

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/14343111511

Upstream-Ref: Automattic/jetpack@4692dab

Author: tbradsha

CHANGELOG.md

@@ -12,6 +12,9 @@ This is an alpha version! The changes listed here are not final.
 ### Changed
 - Code: First pass of style coding standards.
 
+### Fixed
+- Code: Update stylesheets to use hex instead of named colors.
+
 ## [2.0.1] - 2025-04-04
 ### Changed
 - Code: Use function-style `exit()` and `die()` with a default status code of 0. [#41167]

styling/dashboard.css

@@ -7,10 +7,10 @@
 	/* Declare JP CSS variables */
 
 	/* TODO: Integrate root-variables.scss from base-styles package */
-	--jp-black: #000000;
+	--jp-black: #000;
 	--jp-gray: #dcdcde;
 	--jp-white-off: #f9f9f6;
-	--jp-white: #ffffff;
+	--jp-white: #fff;
 	--font-headline-medium: 48px;
 	--font-headline-small: 36px;
 	--font-title-medium: 24px;