WebGLRenderingContext.blendColor

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

Syntax

void gl.blendColor(red, green, blue, alpha);

Parameters

red

A GLclampf for the red component in the range of 0 to 1.

green

A GLclampf for the green component in the range of 0 to 1.

blue

A GLclampf for the blue component in the range of 0 to 1.

alpha

A GLclampf for the alpha component (transparency) in the range of 0 to 1.

Return value

None.

Examples

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]

Specifications

Specification	Status	Comment
WebGL 1.0 The definition of 'blendColor' in that specification.	Recommendation	Initial definition.
OpenGL ES 2.0 The definition of 'glBlendColor' in that specification.	Standard	Man page of the OpenGL API.

Browser compatibility

See also

• WebGLRenderingContext.blendEquation()
• WebGLRenderingContext.blendFunc()