Night mode for tracker

[maxjkwang]

Currently, Tracker doesn't have a night mode. If one were to use night mode plugins/chrome experimental night mode, the colors would become quite intense. It would be ideal if tracker could have a built-in night mode option.

(blurred out unpublished event but left there so ppl can see the color)

[NoRePercussions]

I would prefer that this is done client-side with the prefers-color-scheme media query.

I also think this would be an opportune time to pull the site-wide color scheme into one set of CSS variables, and reference that around other classes.

If anyone is interested in color-picking regardless of your feelings on CSSing, let me know.

[maxjkwang]

Now that I've used it for a while I think the automatic colors are fine...But I'm also horrible at design so other ppl should give better suggestions.
That being said, it's probably better to have an actual night mode rather than depending on external plugins.