Each of the chakras is represented by a color on the bracelet — violet, indigo, light blue, green, yellow, orange, and red. The only essential feature of a chakra bracelet is that you understand its significance.
Not every rainbow colored bracelet is a chakra bracelet, but all bracelets colored in this way can be worn as chakra bracelets and thereby achieve the intended balancing and healing effects. Because our energy can be influenced by energy surrounding us, it makes sense that there would be both bad and good influences.
So if that’s the case, wouldn’t it make sense to surround yourself with things that lift you up instead of lowering your energy? That’s why the sages of ancient India often prescribed such jewelry to be worn in close contact with the skin.