When you think of blacklight reactive colors, your mind probably immediately thinks of white. Actually, the white itself isn't blacklight reactive, but many white objects are treated with fluorescent compounds which are reactive. For example, white paper is treated chemically with fluorescent compounds to increase brightness. Paper before 1950 wasn't treated with these compounds and therefore doesn't glow under blacklight. In the same vein, laundry detergent contains fluorescence to increase whiteness, which contributes to the blacklight reactivity of white clothes; fluorescence in toothpaste make teeth look whiter in normal light and extra bright under ultraviolet light.
Many clear objects react to blacklight, including diamonds, cat urine and "invisible" blacklight-reactive paint. Club soda gets its bitter taste from the quinine found in the beverage; quinine is a fluorescent compound and appears blue under blacklight. Petroleum jelly is another clear substance that contains phosphors and therefore absorbs and re-emits ultraviolet light.
"Hot" colors such as hot pink, hot orange and hot yellow contain phosphors to increase the brightness of their hues. These colors glow very brightly under blacklight due to the high amount of phosphorescent compounds used to create them. Paints treated with fluorescent compounds to become blacklight reactive also glow under ultraviolet light; these paints come in virtually every hue.