WebGLRenderingContext: blendColor() method

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

Note: This feature is available in Web Workers.

The WebGLRenderingContext.blendColor() method of the WebGL API is used to set the source and destination blending factors.

Syntax

blendColor(red, green, blue, alpha)

red: A GLclampf for the red component in the range of 0 to 1. Default value is 0.
green: A GLclampf for the green component in the range of 0 to 1. Default value is 0.
blue: A GLclampf for the blue component in the range of 0 to 1. Default value is 0.
alpha: A GLclampf for the alpha component (transparency) in the range of 0. to 1. Default value is 0.

To set the blend color, use:

gl.blendColor(0, 0.5, 1, 1);

To get the blend color, query the BLEND_COLOR constant which returns a Float32Array.

gl.getParameter(gl.BLEND_COLOR);
// Float32Array[0, 0.5, 1, 1]

Specification
WebGL Specification # 5.14.3

	desktop					mobile
	Chrome	Edge	Firefox	Opera	Safari	Chrome Android	Firefox for Android	Opera Android	Safari on iOS	Samsung Internet	WebView Android	WebView on iOS
`blendColor`	Chrome – Full support Chrome 9 (Release date: 2011-02-03) footnote Full support	Edge – Full support Edge 12 (Release date: 2015-07-29) footnote Full support	Firefox – Full support Firefox 4 (Release date: 2011-03-22) footnote Full support	Opera – Full support Opera 12 (Release date: 2012-06-14) footnote Full support	Safari – Full support Safari 5.1 (Release date: 2011-07-20) footnote Full support	Chrome Android – Full support Chrome Android 25 (Release date: 2013-02-27) footnote Full support	Firefox for Android – Full support Firefox for Android 4 (Release date: 2011-03-29) footnote Full support	Opera Android – Full support Opera Android 12 (Release date: 2012-02-25) footnote Full support	Safari on iOS – Full support Safari on iOS 8 (Release date: 2014-09-17) footnote Full support	Samsung Internet – Full support Samsung Internet 1.5 (Release date: 2013-09-25) footnote Full support	WebView Android – Full support WebView Android 4.4.3 (Release date: 2014-06-02) footnote Full support	WebView on iOS – Full support WebView on iOS 8 (Release date: 2014-09-17) footnote Full support

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