Go Language CSS Color Parser Library

Go library for parsing CSS color string as defined in the W3C's CSS Color Module Level 4. It supports parsing for absolute and relative color formats.

Supported Color Format

• Named colors
• RGB hexadecimal (with and without # prefix)
  • Short format #rgb
  • Short format with alpha #rgba
  • Long format #rrggbb
  • Long format with alpha #rrggbbaa
• rgb() and rgba()
• hsl() and hsla()
• hwb()
• lab()
• lch()
• oklab()
• oklch()
• color(srgb ...)
• color(srgb-linear ...)
• color(xyz ...)
• color(xyz-d50 ...)
• color(xyz-d65 ...)
• hwba(), hsv(), hsva() - not in CSS standard.

Usage Examples

import "github.com/mazznoer/csscolorparser"

Parse Single Color

c, err := csscolorparser.Parse("gold")

if err != nil {
    panic(err)
}

fmt.Printf("R:%.3f, G:%.3f, B:%.3f, A:%.3f", c.R, c.G, c.B, c.A) // R:1.000, G:0.843, B:0.000, A:1.000
fmt.Println(c.RGBA255())   // 255 215 0 255
fmt.Println(c.HexString()) // #ffd700
fmt.Println(c.RGBString()) // rgb(255 215 0)

Parse Multiple Colors

for c, err := range csscolorparser.ParseColors("red, #00ff00, rgb(0, 0, 255)") {
    if err != nil {
        fmt.Println(err)
        continue
    }
    fmt.Println(c.HexString())
}

Try It Online

• Playground 1
• Playground 2

Similar Projects

• csscolorparser (Rust)
• csscolorparser (Javascript)