Select a colorscheme as if drawing lots.
You can select a colorscheme randomly. Run this command in vim.
:PickColorscheme
If you want to limit colorschemes to pick, run this command in vim. In this case, the colorscheme will be selected from either "blue" or "default".
:PickColorscheme blue default
Or
:lua require("pick-colorscheme").pick_colorscheme({"blue", "default"})