Vintage M. Grumbacher Color Computer (CAT NO. 420) – an essential tool for artists, illustrators, designers, and decorators. Helps visualize primary, secondary, and tertiary color relationships and how to mix tints, tones, and shades.

You will receive one wheel. I have multiple available — select your desired quantity at checkout!



The NOS Grumbacher Color Computer CAT NO. 420 is a vintage color wheel designed for artists in 1972. Made by the reputable brand Grumbacher, this tool serves as a valuable resource for artists to experiment with different color combinations and create harmonious palettes for their work. Its unique design allows artists to easily identify and mix colors to achieve the desired tones and hues in their paintings. This vintage color wheel is a timeless tool that continues to be a helpful accessory for artists and craftspeople today.