WebGLRenderingContext.clearColor

The WebGLRenderingContext.clearColor() method of the WebGL API specifies the color values used when clearing color buffers.

This specifies what color values to use when calling the clear() method. The values are clamped between 0 and 1.

Syntax

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

Parameters

red

A GLclampf specifying the red color value used when the color buffers are cleared. Default value: 0.

green

A GLclampf specifying the green color value used when the color buffers are cleared. Default value: 0.

blue

A GLclampf specifying the blue color value used when the color buffers are cleared. Default value: 0.

alpha

A GLclampf specifying the alpha (transparency) value used when the color buffers are cleared. Default value: 0.

Return value

None.

Examples

gl.clearColor(1, 0.5, 0.5, 3);

To get the current clear color, query the COLOR_CLEAR_VALUE constant which returns a Float32Array.

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

Specifications

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

Browser compatibility

See also

• WebGLRenderingContext.clear()
• WebGLRenderingContext.clearDepth()
• WebGLRenderingContext.clearStencil()