Overleaf/services/web/frontend/stylesheets/bootstrap-5/scss/bootstrap-variable-overrides.scss

// This file is included before Bootstrap and is used to override Bootstrap
// default variables and styles
@import 'bootstrap-variable-overrides/fonts';
@import 'bootstrap-variable-overrides/buttons';

// This isn't great but is necessary to persuade Bootstrap to render white text
// on our green buttons
$min-contrast-ratio: 3;