//
// Color contrast
// See https://github.com/twbs/bootstrap/pull/30168
//

// Set color
@function shadow-color($color, $value: 10%) {
	@if color-contrast($color) == $black {
		@return darken($color, $value);
	} @else {
		@return lighten($color, $value);
	}
}

// Shade or tint color
@function auto-shade-tint($color, $weight: 10%) {
	@if luminance($color) >= 0.5 {
		@return shade-color($color, $weight);
	} @else {
		@return tint-color($color, $weight);
	}
}