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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

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
clearColorChrome Full support 9Edge Full support 12Firefox Full support 4IE Full support 11Opera Full support 12Safari Full support 5.1WebView Android Full support YesChrome Android Full support 25Firefox Android Full support YesOpera Android Full support 12Safari iOS Full support 8.1Samsung Internet Android Full support Yes

Legend

Full support  
Full support

See also

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