Skill v1.0.0

currentAutomated scan100/100

pixijs/pixijs-skills/pixijs-color

──Details

PublishedJune 16, 2026 at 11:18 PM

Content Hashsha256:7635f6e165038a96...

Git SHA6aae70d76cf4

──Files

Files (1 file, 8.6 KB)

SKILL.md8.6 KBactive

SKILL.md · 301 lines · 8.6 KB

version: "1.0.0" name: pixijs-color description: "Use this skill when creating, converting, or manipulating colors in PixiJS v8. Covers Color class input formats (hex, CSS names, RGB/HSL objects, arrays, Uint8Array), conversion methods (toHex, toNumber, toArray, toRgba), component access, setAlpha/multiply/premultiply, Color.shared singleton. Triggers on: Color, ColorSource, hex, rgb, hsl, tint, premultiply, Color.shared, color conversion." license: MIT

The Color class creates and converts colors for tints, fills, strokes, and anywhere PixiJS accepts a ColorSource. Most APIs accept raw hex/strings directly, so explicit new Color(...) is only needed when converting formats or manipulating values.

Quick Start

const fillColor = new Color("#ff6600");
console.log(fillColor.toHex()); // '#ff6600'
console.log(fillColor.toNumber()); // 0xff6600
console.log(fillColor.toArray()); // [1, 0.4, 0, 1]
const g = new Graphics().rect(0, 0, 200, 100).fill(fillColor);
app.stage.addChild(g);
const sprite = Sprite.from("hero.png");
sprite.tint = "dodgerblue";
app.stage.addChild(sprite);
const t = Color.shared.setValue(0xffffff).multiply([1, 0.5, 0.5]).toNumber();
sprite.tint = t;

Related skills: pixijs-scene-graphics (fill/stroke colors), pixijs-scene-sprite (tint), pixijs-blend-modes (compositing).

Core Patterns

Accepted input formats

import { Color } from "pixi.js";
// Hex integer
new Color(0xff0000);
// Hex strings
new Color("#ff0000");
new Color("#f00");
new Color("ff0000");
// CSS color names
new Color("red");
new Color("dodgerblue");
// RGB/RGBA objects (components 0-255)
new Color({ r: 255, g: 0, b: 0 });
new Color({ r: 255, g: 0, b: 0, a: 0.5 });
// HSL/HSLA objects
new Color({ h: 0, s: 100, l: 50 });
new Color({ h: 0, s: 100, l: 50, a: 0.5 });
// HSV/HSVA objects
new Color({ h: 0, s: 100, v: 100 });
// CSS strings
new Color("rgb(255, 0, 0)");
new Color("rgba(255, 0, 0, 0.5)");
new Color("hsl(0, 100%, 50%)");
// Normalized 0-1 arrays (Float32Array or plain arrays)
new Color([1, 0, 0]); // RGB
new Color([1, 0, 0, 0.5]); // RGBA
// Uint8 arrays (components 0-255)
new Color(new Uint8Array([255, 0, 0]));
new Color(new Uint8ClampedArray([255, 0, 0, 128]));
// 8-digit hex with alpha
new Color("#ff0000ff");
new Color("#f00f");
// Copy from another Color instance
const red = new Color("red");
const copy = new Color(red);

Conversion methods

import { Color } from "pixi.js";
const color = new Color("#ff6600");
color.toHex(); // '#ff6600'
color.toHexa(); // '#ff6600ff' (hex with alpha)
color.toNumber(); // 0xff6600
color.toArray(); // [1, 0.4, 0, 1] (normalized RGBA)
color.toRgbArray(); // [1, 0.4, 0] (normalized RGB, no alpha)
color.toRgbaString(); // 'rgba(255,102,0,1)'
color.toRgba(); // { r: 1, g: 0.4, b: 0, a: 1 }
color.toRgb(); // { r: 1, g: 0.4, b: 0 }
color.toUint8RgbArray(); // [255, 102, 0]
// setValue() is the chainable way to change a color's value
color.setValue(0xff0000).toHex(); // '#ff0000'

Component access

import { Color } from "pixi.js";
const color = new Color("rgba(255, 128, 0, 0.8)");
color.red; // 1
color.green; // ~0.502
color.blue; // 0
color.alpha; // 0.8

All component getters return normalized 0-1 values.

Manipulation

import { Color } from "pixi.js";
const color = new Color("red");
// Set alpha (chainable)
color.setAlpha(0.5);
// Multiply with another color (destructive, modifies in place)
color.multiply(0x808080);
// Premultiply alpha (destructive, RGB channels multiplied by alpha)
color.premultiply(0.8);
// Premultiply alpha only (RGB unchanged)
color.premultiply(0.8, false);
// Chain operations
new Color("white").setAlpha(0.5).multiply([0.8, 0.2, 0.2]);

multiply() and premultiply() are destructive; they modify the color and set value to null (original format is lost).

Non-destructive premultiplied output

import { Color } from "pixi.js";
const color = new Color("red").setAlpha(0.5);
const packed = color.toPremultiplied(color.alpha); // 0x7F7F0000
const alphaOnly = color.toPremultiplied(color.alpha, false); // 0x7FFF0000

toPremultiplied(alpha, applyToRGB?) returns a 32-bit 0xAARRGGBB integer without mutating this. Use it in batchers and tint math where the source color must be reused. When applyToRGB is false, only the alpha byte is packed; the RGB stays at its full value.

Reusing output buffers

import { Color } from "pixi.js";
const rgba = new Float32Array(4);
const rgb = new Float32Array(3);
const rgb8 = new Uint8Array(3);
app.ticker.add(() => {
  Color.shared.setValue(sprite.tint).toArray(rgba).toRgbArray(rgb);
  Color.shared.toUint8RgbArray(rgb8);
});

toArray(out?), toRgbArray(out?), and toUint8RgbArray(out?) accept a reusable number[], Float32Array, Uint8Array, or Uint8ClampedArray and write into it. Pass your own buffer in hot paths to avoid allocating per frame; omit the argument and the Color instance returns its internal cache array.

Packing for GPU buffers

Method	Returns
`toBgrNumber()`	24-bit `0xBBGGRR` integer with R/B swapped
`toLittleEndianNumber()`	Same 24-bit swap, convenient for little-endian vertex writes

Both are cheap and useful when emitting colors straight into packed vertex attributes.

Color.shared for temporary operations

import { Color } from "pixi.js";
// One-off conversion without allocating a new Color
const hex = Color.shared.setValue("#ff6600").toNumber();
const arr = Color.shared.setValue(0xff0000).toArray();

Color.shared is a singleton that avoids allocating a new Color on every call. This matters in hot paths like render loops or per-frame tint calculations where repeated new Color() creates GC pressure. Do not store references to it; other code may mutate it.

import { Color } from "pixi.js";
// Good: reuse shared instance in a per-frame callback
app.ticker.add(() => {
  const t = performance.now() / 1000;
  sprite.tint = Color.shared
    .setValue("white")
    .multiply([Math.sin(t) * 0.5 + 0.5, 0.2, 0.8])
    .toNumber();
});

Validating input

import { Color } from "pixi.js";
Color.isColorLike("red"); // true
Color.isColorLike("#ff0000"); // true
Color.isColorLike(0xff0000); // true
Color.isColorLike([1, 0, 0]); // true
Color.isColorLike({ r: 1, g: 0, b: 0 }); // true
Color.isColorLike({ foo: 1 }); // false
Color.isColorLike(null); // false

Color.isColorLike() checks the structural shape (string, number, array, or recognized object). It doesn't validate that a string is a real CSS color name, nor that array values fall in range. Use it as a type guard before passing user input to new Color() or setValue().

Common Mistakes

[MEDIUM] Expecting toRgba() to return 0-255 values

Wrong:

import { Color } from "pixi.js";
const { r, g, b } = new Color({ r: 255, g: 128, b: 0 }).toRgba();
// r = 1, g = ~0.502, b = 0 (NOT 255, 128, 0)

Correct:

import { Color } from "pixi.js";
// Use toUint8RgbArray() for 0-255 output
const [r, g, b] = new Color({ r: 255, g: 128, b: 0 }).toUint8RgbArray();
// r = 255, g = 128, b = 0

RGB object _inputs_ use 0-255 range ({ r: 255, g: 0, b: 0 }), but all output methods (toRgba(), toRgb(), toArray(), toRgbArray()) normalize to 0-1. Use toUint8RgbArray() when you need 0-255 integers for CSS or external APIs.

[MEDIUM] Using 0-255 range in color arrays

Wrong:

import { Color } from "pixi.js";
new Color([255, 0, 0]); // NOT red; values are interpreted as 0-1

Correct:

import { Color } from "pixi.js";
new Color([1, 0, 0]); // red via normalized array
new Color(0xff0000); // red via hex
new Color("red"); // red via CSS name
new Color(new Uint8Array([255, 0, 0])); // red via Uint8Array (0-255)

Plain number arrays (number[] and Float32Array) use normalized 0-1 range. [255, 0, 0] clamps to [1, 0, 0] because values are clamped, but [200, 100, 50] does not produce the expected color. Use Uint8Array or Uint8ClampedArray for 0-255 input.

[MEDIUM] Using utils.string2hex or utils.hex2string

Wrong:

import { utils } from "pixi.js";
const hex = utils.string2hex("#ff0000");

Correct:

import { Color } from "pixi.js";
const hex = new Color("#ff0000").toNumber();
const str = new Color(0xff0000).toHex();

The utils namespace was removed in v8. Use the Color class for all color conversions.

API Reference

All versions