"Solid Color" background type (port from Drippy to base mod)

[DoodeJr]

Solid Color Backgrounds

Add a background type option "Solid Color" (or for EN-GB localization "Solid Colour"), which would allow for entering a color's Hex Code, and then the background would be that color. Potentially also opens up the background menu to support more color options (gradients, etc.) later?Eh

[Keksuccino]

That kinda exists already, but only if you have Drippy Loading Screen installed :D
It adds exactly this background type, but yeah, will add it to the base mod in the future probably.