Troubleshooting My Sonicare DiamondClean Smart lights up orange/purple The bottom of your Sonicare DiamondClean Smart toothbrush has a light ring. This is a guided brushing feature. Find out what the colours mean. The bottom of my Sonicare handle lights up orange The amber or orange colour is telling you to replace your brush head. This is based on the smart brushing experience. The bottom of my Sonicare handle lights up purple If you put too much pressure on your Philips Sonicare DiamondClean Smart while brushing, the bottom of the toothbrush will light up purple. Try brushing your teeth with less pressure.