.color {
	color: rgb(from #dddd r g b / calc(alpha / 2));
	color: alpha(from #dddd / calc(alpha / 2));
}

:root {
	--a-color: rgb(from rgb(2 1 0 / var(--a)) r g b / calc(alpha / 2));
	--a-color: alpha(from rgb(2 1 0 / var(--a)) / calc(alpha / 2));
}
