Accessibility - Contrast too weak for links in (vulnerable front end library) tables in dark mode

[SphinxKnight]

Provide the steps to reproduce

1. Run LH on http://www.orleans-metropole.fr/
2. In the "Best practices" tab/part, in the "Includes front-end JavaScript libraries with known security vulnerabilites"
3. Unfold this category
   (4. Enable dark mode (if not already enabled))

What is the current behavior?

The link provided in the "Library Version" column is unreadable as contrast ratio is 1.5:1

What is the expected behavior?

The color for this link should adapt to dark mode and maybe use the same color as the other URLs

Environment Information

• Affected Channels: DevTools
• Lighthouse version:
• Chrome version: tested on Canary (82.0.4065.1) & Release (80.0.3987.116)
• Node.js version:
• Operating System: Windows 10

Related issues
#4034

[patrickhulce]

Thanks very much for filing @SphinxKnight! This would be a great first issue if anyone is interested :)

Basically add .lh-table-column--link a to our defined link styles

lighthouse/lighthouse-core/report/html/report-styles.css

Lines 341 to 346 in fa70748

	.lh-audit-group a,
	.lh-category-header__description a,
	.lh-audit__description a,
	.lh-footer a {
	color: var(--color-informative);
	}

EDIT: @SphinxKnight already filed a PR for this! WOW! :)