Rainbow

rainbow.scss

div {
	$colors: (
		#c82639,
		#ef8e00,
		#9bbc1a,
		#28649a,
	);
	$l: length($colors);
	@each $color in $colors {
		$i: index($colors, $color);
		&:nth-child(#{$l}n+#{$i}) {
			.readmore a {
				color: $color;
				border-color: $color;
				&:hover {
					background: $color;
				}
			}
		}
	}
}