GL_INGR_color_clamp
https://www.khronos.org/registry/OpenGL/extensions/INGR/INGR_color_clamp.txt
GL_INGR_color_clamp

	GL_RED_MIN_CLAMP_INGR 0x8560
	GL_GREEN_MIN_CLAMP_INGR 0x8561
	GL_BLUE_MIN_CLAMP_INGR 0x8562
	GL_ALPHA_MIN_CLAMP_INGR 0x8563
	GL_RED_MAX_CLAMP_INGR 0x8564
	GL_GREEN_MAX_CLAMP_INGR 0x8565
	GL_BLUE_MAX_CLAMP_INGR 0x8566
	GL_ALPHA_MAX_CLAMP_INGR 0x8567
