Change in color over time for two example individuals. From left to right: at the start of the experiment, 7 weeks later, and after freezing and cleaning at the end of the experiment. Individual a. was kept on blue-gray substrate and individual b. was kept on reddish-brown substrate. For visualization, the bars under the images show the average dorsal color as captured by the CIE-L*a*b* values measured for each individual at each point in time.