Golang: Hex to RGB/RGBA

hex_to_rgba.go

// HexToRGB converts a 24 bit hex number into its corresponding RGB color
// with 100% alpha
//
//     clr := HexToRGB(0xFFAA00)
//     fmt.Printf("%+v\n", clr) // {R:255 G:170 B:0 A:255}
func HexToRGB(hex uint32) color.RGBA {
	r := uint8((hex & 0xFF0000) >> 16)
	g := uint8((hex & 0xFF00) >> 8)
	b := uint8(hex & 0xFF)

	return color.RGBA{r, g, b, 255}
}

// HexToRGB converts a 32 bit hex number into its corresponding RGBA color
//
//     clr := HexToRGBA(0xFFAA00BB)
//     fmt.Printf("%+v\n", clr) // {R:255 G:170 B:0 A:187}
func HexToRGBA(hex uint32) color.RGBA {
	r := uint8((hex & 0xFF000000) >> 24)
	g := uint8((hex & 0xFF0000) >> 16)
	b := uint8((hex & 0xFF00) >> 8)
	a := uint8(hex & 0xFF)

	return color.RGBA{r, g, b, a}
}