Spence, Wong, Rusan, and Rastegar (16) examined the ability to recognise coloured and gray-scale images of neutral scenes with 120 participants. They reported that participants’ recognition of the neutral scenes were approximately 5% higher in the coloured condition compared to the grey scale condition, F (1, 112) = 47.0, P < 0.0001. The same comparison was significant at the 0.05 level or better for different exposure durations. A similar finding was reached in a recall test conducted by Smilek and colleagues (15). Smilek, Dixon, and Merikle (15), carried out a study to investigate the influence of colour on memory performance. They used digit numbers with four different conditions; black, white, congruent, and incongruent colour conditions. They utilized the undergraduate students as their participants in the study. Three minutes were given to the participants to study the stimuli and another three minutes for them to recall the stimuli. The stimuli were exposed to the participants through a computer screen. Significant differences were found between recall conditions. The memory performance of the participants was found to be better in the congruent colour condition compared to the other conditions (26).