It would be delightful if we lived in a world where we always had ample time and money to skip around the corner and hop into the friendly neighborhood hairdresser's chair. She'd gently massage your scalp and gossip conspiratorially about her boyfriend's sister before applying the perfect not-too-orange, not-too-purple concoction that the two of you developed over years of trial and error and torn-out magazine pictures of Scarlett Johansson during that one movie premiere. You'd emerge into the sunlight with your hair glowing as if lit from within by an inner flame.
But sadly, that world is not our own. SO: these drugstore root touch-ups are inexpensive, incredibly easy to use, and can blend in with tons of different brands of hair color (they're designed to mimic the way colored hair looks after three weeks of fading). The brush is fairly drip-proof, the dye doesn't smell terribly strong, and whether you dye your hair at home or go to a salon, this product can help extend time between full-on colorings by months, saving you time and money.