Free solid colors for profile banners

While I can understand having actual images walled behind nitro for profile banners, I think it would be nice if we could choose some solid colors for our banners as many of us just want certain colors rather than a default color.  I, for instance would like to set my profile picture to a certain shade of purple, but my banner automatically makes it a different one.  I would even take pre-set colors to choose if a color picker is too much