Table caption, table headers, term definitions are almost unreadable in dark mode

[patrickhlauke]

Describe the change

When switching to dark mode, <th> table headers are styled to use gray (#dddddd) on an off-white background (#eeeeee), making them practically unreadable (1.2:1 contrast ratio). While not as dramatic, the <caption> that precedes the tables uses gray (#555555) on black (#000000), which is also far from ideal (2.8:1 contrast ratio)

Also just spotted: term definition links use green text (#006400) which on black also has insufficient contrast (2.8:1).

Link to the version of the specification or documentation you were looking at

Link to documentation: https://w3c.github.io/aria/

Does the issue exists in the editors draft (the editors draft is the most recent draft of the specification)?

Yes

[pkra]

Duplicate of #2397, #2398, #2400 etc.

Will be fixed via #2410