Whether you’re in the process of transitioning to gray or you’ve had a full head of silvery strands for years now, finding the right shampoo can make a big difference in the tone and texture of your hair. Gray hair is prone to picking up yellow tones from everyday elements like sunlight, hard water and pollution. It also tends to grow in coarse and wiry. Luckily, with a bit of patience and a proper purple shampoo, you can keep your hair cool, smooth and shiny.