vim9script

g:rainbow_active = 1

g:rainbow_conf = {
    'guifgs': ['royalblue3', 'darkorange3', 'seagreen3', 'firebrick'],
    'ctermfgs': ['lightblue', 'lightyellow', 'lightcyan', 'lightmagenta'],
    'guis': [''],
    'cterms': [''],
    'operators': '_,_',
    'parentheses': ['start=/(/ end=/)/ fold', 'start=/\[/ end=/\]/ fold', 'start=/{/ end=/}/ fold'],
    'separately': {
        '*': 0,
        'lisp': {
            'guifgs': ['royalblue3', 'darkorange3', 'seagreen3', 'firebrick', 'darkorchid3'], # lisp needs more colors for parentheses :)
        },
        'scheme': {
            'guifgs': ['royalblue3', 'darkorange3', 'seagreen3', 'firebrick', 'darkorchid3'], # and scheme too!
        },
    }
}

packadd rainbow
RainbowToggleOn