Croton is an ornamental plant that produces leaf colors that range from yellows to pinks and magenta reds and browns. And Crotons have them all in one when planted mixed! It was a great opportunity in this subject to make use of many colors.
In retrospect, painting maybe just a couple of leaves would have been a better choice. Multiple colors in a painting do not necessarily mean they will appear harmonious; and our eyes keep moving and wandering all over!