Is there a way to make it work with dynamic SASS variables?

[luco]

I'm willing if is there a way to make it work with something like this:

$colors: (
	"c1": #593586,
	"c2": #94c350,
	"text": #666,
	"border": #e5e5e5,
	"black": #000,
);

:root {
	@each $id, $color in $colors {
		--#{$id}: #{$color};
		--#{$id}-rgb: #{toRGB($color)};
	}
}

It seems it doens't find the c1 variable, for example. Only when defined previously in :root.