GLclampf green,
                                     GLclampf blue,
                                     GLclampf alpha )

PARAMETERS
       red, green, blue, alpha
                             Specify  the  red,  green,  blue, and alpha values
                             used when the color buffers are cleared.  The ini‐
                             tial values are all 0.

DESCRIPTION
       glClearColor  specifies  the  red, green, blue, and alpha values used by
       glClear to clear the color buffers.  Values  specified  by  glClearColor
       are clamped to the range [0, 1].

ERRORS
       GL_INVALID_OPERATION  is  generated  if glClearColor is executed between
       the execution of glBegin and the corresponding execution of glEnd.

ASSOCIATED GETS
       glGet with argument GL_COLOR_CLEAR_VALUE

SEE ALSO
       glClear

                                                               GLCLEARCOLOR(3G)