Hex to RGB conversion in Go

color.go

package main

import (
	"fmt"
	"strconv"
)

type Hex string

type RGB struct {
	Red   uint8
	Green uint8
	Blue  uint8
}

func (h Hex) toRGB() (RGB, error) {
	return Hex2RGB(h)
}

func Hex2RGB(hex Hex) (RGB, error) {
	var rgb RGB
	values, err := strconv.ParseUint(string(hex), 16, 32)

	if err != nil {
		return RGB{}, err
	}

	rgb = RGB{
		Red:   uint8(values >> 16),
		Green: uint8((values >> 8) & 0xFF),
		Blue:  uint8(values & 0xFF),
	}

	return rgb, nil
}

func main() {
	var rgb RGB
	var err error

	var hex Hex = Hex("FFAAFF")

	// Usage:
	rgb, err = Hex2RGB(hex)

	if err != nil {
		panic("Couldn't convert hex to rgb")
	}

	fmt.Println(fmt.Sprintf("#%s = %d,%d,%d", hex, rgb.Red, rgb.Green, rgb.Blue))

	// or

	// Usage:
	rgb, err = hex.toRGB()

	if err != nil {
		panic("Couldn't convert hex to rgb")
	}

	fmt.Println(fmt.Sprintf("#%s = %d,%d,%d", hex, rgb.Red, rgb.Green, rgb.Blue))
}

// HexColor converts hex color to color.RGBA with "#FFFFFF" format
func HexColor(hex string) color.RGBA {
	values, _ := strconv.ParseUint(string(hex[1:]), 16, 32)
	return color.RGBA{R: uint8(values >> 16), G: uint8((values >> 8) & 0xFF), B: uint8(values & 0xFF), A: 255}
}