- [x] feature: configurable color scheme
    - general design should stay consistent
    - only colors should be configurable; not the way the colors are used/presented (e.g. frosted glass effect with color blobs behind shouldn't change)
    - this should play nicely together with the theme control tool in `/Users/valdemar/Developer/Personal/Tools/tint`.
    - maybe a configuration file (e.g. ~/.config/conjure/config.toml) is warranted