The Simultaneous Contrast Effect

Requires a Wolfram Notebook System

Interact on desktop, mobile and cloud with the free Wolfram CDF Player or other Wolfram Language products.

Requires a Wolfram Notebook System

Edit on desktop, mobile and cloud with any Wolfram Language product.

The two center squares have the same color. Change the colors behind them to see their apparent contrast.

Contributed by: Rob Morris (April 2007)
Additional contributions by: Sándor Kabai
Open content licensed under CC BY-NC-SA



This Demonstration was inspired by the work of Josef Albers.

Based on: A. Buhler-Allen, "The Math of Art: Exploring Connections between Math and Color Theory," in Proceedings of the Bridges London Conference, (R. Sarhangi and J. Sharp, eds.), Hertfordshire, UK: Tarquin Publications, 2006 p. 517.

Here is an excerpt from Buhler-Allen's paper:

In the mid 1800s a chemist with a specialty in dyes, Michael Eugene Chevreul, introduced his book, The Principles of Harmony and Contrast of Colors [1]. Chevreul noticed that a color's character changes; the same color can look lighter or darker depending on its juxtaposition to other colors. It is said that his "Law of Simultaneous Contrast" was conceived in the tapestry (Gobelin) factory where he noticed that the strength of the black depended on what colors were next to it. [1] M.E. Chevreul, The Principles of Harmony & Contrast of Colors, Faber Birren, first printed 1839

Feedback (field required)
Email (field required) Name
Occupation Organization
Note: Your message & contact information may be shared with the author of any specific Demonstration for which you give feedback.