Ghost Colors

This is one of my earliest color optical illusions. There is no yellow or green in the diamond shapes, just vertical black lines! (If you don’t believe it, use a eyedropper tool to check it.) This intriguing visual effect is mainly due to “simultaneous color contrast induction“.

Illusive colors
Ghost Squares / Black Diamonds (2002 – 2007)

Below are the animated versions of my op art:

There is no yellow in this GIF!
There is no green in this GIF!

Some intriguing variants. The yellowish and greenish spirals within the radiating patterns are actually made of black segments.

Ghost Spirals / Black Spirals (2006 – 2008)

I have also created more complex illusions using this technique. Actually, you can design and develop interesting logos and products with color contrast induction effects.

No Red (2017). Op Art, simultaneous contrast color induction. The picture contains only black and green vertical lines.
No Blue (2017). Op Art, simultaneous contrast color induction. The picture contains only black and orange vertical lines.
No Yellow, contrast color induction
No Yellow (2017). Op Art, simultaneous contrast color induction. The picture contains only black and blue vertical lines.

These illusions are available as prints and canvases from my online official gallery.

Related illusion: illusive color radial beams