Colour models and colour spaces:
	LMS
	L'M'S'
	ICtCp
	YCbCr
	Y'CbCr
	TSL
	Y'UV
	Y'IQ
	Y'ES
	rgY
	RGK
	CIE DSH
	HSP
	HCY
	HCG
	Hunter 1948 color space (see Wikipedia article on CIELAB; see http://www.konicaminolta.com/instruments/knowledge/color/part4/06.html)
	Hunter Rdab
	CIELCh (CIEHLC) (see Wikipedia article on CIELAB)
	IPT
	xvYCC
	scRGB
	HWB (Alternative RGB model)
	HSL (Alternative RGB model)
	HSV (Alternative RGB model)
	HSI (Alternative RGB model)
	HCL (Alternative RGB model)
	HCV (Alternative RGB model)
	HCI (Alternative RGB model)

Support for generic additive colour spaces (3 channels and more)
Support for generic subtractive colour spaces (3 channels and more)

GPU accelerate libcolour_convert_en_masse
Premultiply matrices for faster conversion from and to RGB