In the blazing summer sunshine, going on a trip, enjoying a beach day, or exercising outdoors may seem like the best seasonal moments. But during all that fun, your hair might be silently suffering a “sunlight assault”—especially for those with color-treated hair. Over time, you may notice your hair becoming increasingly yellow, dry, and dull, with split ends and breakage. These issues are largely caused by a combination of UV rays, heat, sea salt, and chlorinated water, all of which damage the hair shaft. If you’re facing the dilemma of your dyed hair turning brassy, it’s time to develop a smart summer hair-care strategy—starting with a truly effective color-protecting solution…