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Part of Visual Dictionary Project
Showing rainbow colors that shift with angle
A soap bubble floats past—pink, then green, then blue, all in one second. An oil slick on wet pavement shows rainbow bands. A peacock feather changes color as you move. This is iridescent: colors that shift depending on the viewing angle.
The word comes from Iris, the Greek goddess of rainbows.
See how iridescence appears in bubbles, oil, feathers, and insects

Soap bubbles are iridescent—their thin film creates ever-shifting rainbow bands.

Peacock feathers are iridescent—their colors come from structure, not pigment.

Oil on water creates an iridescent film as light bounces between thin layers.

Many beetles have iridescent shells that flash different colors as they move.
Test your understanding of iridescent in context
What makes something iridescent rather than just colorful?