roles

utils/colors.go

@@ -0,0 +1,21 @@
+package utils
+
+import "math"
+
+func IsDarkColor(r, g, b uint8) bool {
+	rC := 0.299 * math.Pow(float64(r), 2)
+	gC := 0.587 * math.Pow(float64(g), 2)
+	bC := 0.114 * math.Pow(float64(b), 2)
+
+	lum := math.Sqrt(rC + gC + bC)
+
+	return lum <= 130
+}
+
+func IntToRgb(color uint32) (uint8, uint8, uint8) {
+	b := color % 256
+	g := color / 256 % 256
+	r := color / (256 * 256) % 256
+
+	return uint8(r), uint8(g), uint8(b)
+}