WebGLRenderingContext: clearColor() 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.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

js
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 (undefined).

Examples

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

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

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

Specifications

Specification
WebGL Specification
# 5.14.3

Browser compatibility

BCD tables only load in the browser

See also