6 Outstanding Drugstore Purple Shampoos That Will Save You Tons of Money

I stole a bottle of this Clairol Professional Shimmer Lights Blonde & Silver Shampoo ($13) from a dude I was dating who was going gray — he swore it helped bring out brighter tones. I've found it also works to dim the appearance of super-dark roots. (Though that's a look, too.)

Even better, it's also a hit among professionals. "This is an industry standard," Scott said. "It's been around longer than me and probably will be long after I'm gone." Since according to Scott, this one can be a little intense, he recommends diluting it with your regular shampoo and limiting your use of it to once or twice a week.