Generate a distinctive color palette

November 10, 2013 [ javascript | golang ]

Recently I needed a set number of distinctive colors (16) for a data visualization task. Here is some Go code, that uses the marvelously documented go-colorful library:

package main

import (

var labels = [...]string{
    "Laning Presence","Jungle","Defend","Push","Escape",
    "Ward","Counterward","Harass","Contest Pull","Fight"}

func main() {
    num_colors := len(labels)

    pal, err := colorful.HappyPalette(num_colors)
    if err != nil {

    colors := make([]string, num_colors)
    for i := 0; i < num_colors; i++ {
        colors[i] = fmt.Sprintf("\"%v\": \"%v\"", labels[i],pal[i].Hex())

    fmt.Printf("colors = {\n")
    fmt.Printf("    %v\n",strings.Join(colors, ", "))

The output of this code is a JavaScript dictionary. The same approach can be used for any other language where you do not wish to deal with the hassle of generating colors during runtime.

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