In the course Color, light and perception with Bengt Ahlin, I created three similar forms in different shades of paper for my project work. A white form with a blue tone, a yellow form with a red tone and a blue form with a green tone. Then I experimented with changing the color of them and their shadows by using different colored lamps and filters. Some of the results can be found here below.

Yellow form in red light.

Green form in blue light.

White form with green light.

Yellow form in blue light.

Green form in green light.

White form with red light.

Yellow form in green light.

Green form in red light.

White form with blue light.