A "physical color" is a combination of pure spectral colors (in the visible range).

"You are familiar with the primary spectral colors," Spock was saying.

"Exactly," said Spock, "which brings us back to the question of why red, green, and blue are called the primary spectral colors."

If this is true, Newton's seven spectral colors would have been:

Another traditional mnemonic device has been to turn the initial letters of seven spectral colors into a sentence.

Purple is a mixture of red and blue light, whereas violet is a spectral color.

Fire refers to the spectral colors which are produced as a result of the diamond dispersing the white light.

The concept is similar to all different spectral colours combining to form white.

To the instant, the stars before us blended into a segue of spectral color and we were at warp.

These spectral colors are repeated in the colors of the windows.