An hour later, the pink light turned violet, and then gray.

A tip exposed to the air quickly turns violet.

Additionally, the urine of all three poisoning victims temporarily turned violet.

The milk is initially white and turns violet, but only if left in contact with the gills or flesh.

With but slight encouragement, I took out an old envelope and one of those pencils that turn bright violet in water.

During this time the entire valley turns violet.

Then the holocube turned violet, and his smile died.

But it's considered very bad manners to cut somebody off unless they've actually gone to sleep, turned violet, or started making love.

He turned the little handle and the two rods seemed to turn violet.

On exposure to air, the white kernel turns violet, then dark grey, and ultimately brown, or black.