The multi-color cubes have three LEDs (red/green/blue) allowing it to mix the colors and produce almost any color. With each press of the button, the color changes from red to green to aqua to white to orange, etc. One last press of the button will turn on "Color Cycling" mode which fades the three LED colors in and out slowly to create a beautiful rainbow of colors that always changes. This must be seen to be believed! You'll be the talk of any party when you drop one of these in your drink.