: Specify the red, green, blue, and alpha values used when the color buffers are cleared. The initial values are all 0.
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'''_glClearColor''' specifies the red, green, blue, and alpha values used by {{KW|_glClear}} to clear the color buffers.
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The type of the {{Parameter|red}}, {{Parameter|green}}, {{Parameter|blue}}, and {{Parameter|alpha}} parameters was changed from GLclampf to GLfloat. This change is transparent to user code.
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{{KW|_glGet}} with argument {{KW|_GL_COLOR_CLEAR_VALUE}}