Table 1. A breakdown of the twelve experimental colours.

The physical parameters of the colours used in the food choice experiments. The RGB values refer to the quantity of red, green, and blue within the colour. The Munsell numbers refer to the hue, value, and chroma according to The Munsell Book of Color where PB, purple blue; Y, yellow; and R, red (Munsell Colour Company, 1970).

Saturation percentages	Blue		Yellow		Red
	RGB	Munsell	RGB	Munsell	RGB	Munsell
100	0, 0, 255	8.0PB 3.5/12	255, 255, 0	10Y 8/12	255, 0, 0	7.5R 4/16
75	0, 0, 191	7.5PB 3/12	191, 191, 0	10Y 7/10	191, 0, 0	7.5R 4/15
50	0, 0, 127	7.5PB 2/10	127, 127, 0	10Y 5/4	127, 0, 0	5R 3/10
25	0, 0, 64	7.5PB 2/3	64, 64, 0	10Y 3/4	64, 0, 0	5R 2/2