Syntax highlighting contrast fails Web Content Accessibility Guidelines

Created by: dadlerj

Reported by https://app.hubspot.com/contacts/2762526/company/693777200

Discussion in Slack: https://sourcegraph.slack.com/archives/C0HMGV90V/p1602173122127700

What customization/color options do we have? I know there are some branding options, but have received feedback about colors that was unexpected.

And from the end user:

Light theme, comments are #93A1A1 on #FFFFFF, with a contrast of 2.67:1, which fails pretty much everything.

Dark theme, they’re #2B8A3E on #0E121B, with a contrast of 4.28:1, which only passes WCAG AA for large text (and objects/UI components), but fails AAA and AA for normal text.

The user suggested that simply adding a high contrast option would be a fine workaround for now