Can different colours influence most comfortable level of speech and music?

It is known from previous studies that different illuminations of the surrounding room can affect the adjustment of most comfortable level of speech. In this experiment, the goal was to examine effects of different colours on most comfortable level. Therefore, adjustments of most comfortable level of speech, classical, and rock music were performed while pictures of differently coloured radios were shown on a display. The sounds were presented diotically via headphones. Average adjusted levels are about 62dB SPL for speech, 65dB SPL for classical music, and 69dB SPL for rock music. While most subjects do not seem to be influenced by different colours, others show deviations in adjusted level dependent on colour of up to 6dB.