Table 1. Details of the composition, source and number of colour samples included as part of the calibration set and target colour sample pairs.

	Calibration set	Target colour sample pair
Source	Munsell Book of Colour & X-rite	X-rite
Number of samples	1301 (Munsell) + 92 (X-rite)	14 colour samples in 7 pairs
Sample details	Red: 139 samples in 4 hues	Pair I: H7 & H8
	Yellow-Red: 123 samples in 4 hues	Pair II: M7 & H4
	Yellow: 143 samples in 4 hues	Pair III: C5 & B6
	Green-Yellow: 127 samples in 4 hues	Pair IV: C3 & I2
	Green: 115 samples in 4 hues	Pair V: C9 & G9
	Blue-Green: 106 samples in 4 hues	Pair VI: G3 & M2
	Blue: 112 samples in 4 hues	Pair VII: B3 & L4
	Purple-Blue: 137 samples in 4 hues
	Purple:131 samples in 4 hues
	Red-Purple: 137 samples in 4 hues
	Neutrals: 31 samples in 8 Values
	Xrite: 92 samples †

^†Excludes the two samples used as target colour pair for each test.