I looked at the stone and found that its color had shifted!

The colour shifts to deep green over a period of 10-20 days.

For a moment it just looked around, its color shifting to a deeper, more uniform blue.

At times the colors shifted like the fire in a gem.

The colors shifted as he moved, keeping things just right automatically.

Its color shifted, too, from gray to pink to dried blood.

She could see the color shifting within his probing gaze - from brown to green and then back again.

The picture shows significant amount of dirt and the colors have shifted severely.

But those trees above us are moving, causing the colors to shift.

The screen blinked, colors shifting, as the computer ran its testing program.