For all 3 versions I used a pale bluegreen colour. I used the colour guide in Illustrator and picked the swatches from “complementary 2”. This gave me the tints and shades from mixing bluegreen with red orange. This gave me some useful warm browns for flesh colours and some darker greys and browns for shading.
This was the least satisfactory. Although I liked the clean lines and the diver, the letters at the bottom don’t work that well.