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.

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.

None (undefined).

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]

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