Inconsistent color for hyperlinks between light/dark themes

[colinmahns]

During some testing with OpenSlides for my user base, we stumbled on this issue with the default color OpenSlides selects for themes being inconsistent between the light and dark themes. In our case, a primary color of a black from our branding guidelines has caused links to not be obvious and visible on items like the Home screen.

Steps to Reproduce:

1. 1. Set OpenSlides colors to the following:

• Primary Color: 231F20
• Accent Color: EC1F27
• Warn Color: F06400

2. Create some example text with hyperlinks in the Home screen (or text of an agenda item or motion).
3. Toggle between light and dark mode

Expected behavior:
Hyperlinks should be the accent color regardless of theme mode.

Potential workaround:
Manual coloring of the text via the in-browser editor bypasses this issue but is time consuming for larger pages.

I've attached some images of the problem on our instance!

[Eich-hoernchen]

to indicate a hyperlink the text should have an underline

by hovering the hyperlink the undeline should change into a smoother primary color, exept the primary color is a dark color in the darkmode, in this case it should be the accent color.