Add faint image of department logo behind class descriptions.

[SciDev5]

Changes:

• Image of department logo now appears behind the class description (blurred and faint in dark mode, just faint in light mode).
• Class buttons now have a hover effect where they get slightly lighter.
  • Fixed issue with textColor where it would silently fail if an rgb(...) color is passed in (like that generated by the color picker on firefox).

[SuperSonicHub1]

Could you also include in the PR a preview of light mode?

[SuperSonicHub1]

We may want to optimize the SVGs using a tool like SVGO.

[SciDev5]

Here is light mode:

[SuperSonicHub1]

Would be great if we could squash 55aa4a8f into 012b787c as to not clog up commit history.

[SuperSonicHub1]

How should we handle courses we couldn't find logos for, if at all? The MIT seal might be a nice placeholder, seeing as especially in light mode this PR gives me watermark vibes, but that would require asking for permission in order to get the files.

[cjquines]

i think it's cute but potentially annoying enough that we might need a way to configure this

[SciDev5]

I could add something in preferences alongside the color theme toggle.

[dtemkin1]

I think something in the preferences would be a good idea (+probably disabled if high contrast is needed?), let us know when it's ready for review!

[SciDev5]

I have added a drop-down to the preferences. "Auto" is enabled in default color schemes and disabled in high-contrast color schemes.

[dtemkin1]

@SciDev5 would you be able to rebase this on main? PR #187 implemented something similar to auto using null instead of it's own setting, which might also work for this

[cjquines]

@SciDev5 bump?