WIP cleanup

scripts/util/colors.ts

@@ -9,8 +9,8 @@ type colorTuple = RgbTuple | RgbaTuple;
 
 // __brand is a compile time-only type trick to make these two incompatible,
 // even though they're really just `string`s.
-type RgbString = string /* & { __brand: 'rgb' }*/;
-type RgbaString = string /* & { __brand: 'rgba' }*/;
+type RgbString = string;
+type RgbaString = string;
 
 /**
  * Returns a string formatted: `rgb(R, G, B)` from RGB number tuple, where
@@ -62,11 +62,7 @@ function rgbaStringToTuple(str: RgbaString): RgbaTuple {
  */
 function rgbaTupleLerp(colorA: RgbaTuple, colorB: RgbaTuple, alpha: number): RgbaTuple {
 	const interp = Math.max(Math.min(alpha, 1), 0);
-	const colorResult: RgbaTuple = [0, 0, 0, 0];
-	for (let i = 0; i < 4; ++i) {
-		colorResult[i] = Math.round(colorA[i] + interp * (colorB[i] - colorA[i]));
-	}
-	return colorResult as RgbaTuple;
+	return (colorA as number[]).map((Ai, i) => Math.round(Ai + interp * (colorB[i] - Ai))) as RgbaTuple;
 }
 
 /**