Color illusion 4

Color illusion IV

Since June 27, 2006

"Dogs of four colors"

There appear to be dogs of four colors, but actually they are of two colors. This effect depends on the chromatic version of the dungeon illusion.

"Dogs of two colors"

There appear to be dogs of two different colors, but actually they are the same yellow. This effect depends on the chromatic version of the dungeon illusion.

"Blue and green turtles"

There appear to be blue turtles and green ones, but actually they are the same color. This effect depends on the chromatic version of the dungeon illusion.

"Ring of blue dots"

When viewing the central dot, its color appears to be purple-blue while the ring appears to be blue, though they are the same color stimuli.

"An intermediate color ring"

The color of the ring pointed by an arrow in the left image is the same as that in the right image, but they appear to be different from each other.

"Quarrel of sea urchins"

The red in the left sea urchin appears to be different in chroma from the red in the right one, but they are identical.

"Illusory red spirals"

This image consists of only cyan (greenish blue) pixels, but there appear reddish spirals.

"Illusory blue spirals"

This image consists of only red, but there appear light-bluish spirals.

"Illusory purple spirals"

This image consists of only green, but there appear purple spirals.

"Illusory golden spirals"

This image consists of only blue, but there appear golden spirals.