Field Name            Bits   Default Description
BLUE                  7:0    none    blue constant color (For R520, this field is ignored, use
                                     RB3D_CONSTANT_COLOR_GB__BLUE instead)
GREEN                 15:8   none    green constant color (For R520, this field is ignored, use
                                     RB3D_CONSTANT_COLOR_GB__GREEN instead)
RED                   23:16  none    red constant color (For R520, this field is ignored, use
                                     RB3D_CONSTANT_COLOR_AR__RED instead)
ALPHA                 31:24  none    alpha constant color (For R520, this field is ignored, use
                                     RB3D_CONSTANT_COLOR_AR__ALPHA instead)
