frontend/css/variables/_maps.scss
// Update color maps
$custom-colors: (
// Backwards compatibility
"default": #bbbbbb
);
$theme-colors: map-merge($theme-colors, $custom-colors);
// Disable box shadows on form controls.
// This is done after importing the default Bootstrap variables as a null value would be overwritten.
$input-box-shadow: null;
$form-select-box-shadow: null;