Acrylic on paper. I painted the eye orange (mixture) and a little yellow. After the eye was dry, I wet the paper, dropped in orange (light and wet). The background colors are actually more intense than shown here, poor photo.
I made a thin blue mixture (i neutralized the blue a little by adding a tiny bit of orange) and painted in some blue.
I mixed a warm dark and started painting the dark areas. I't at the beginning.