I know it looks a bit orange, but it won't once it's applied to something. Got to put it on something though, not just leave it loose and shake it at someone or have it fall out of letter or what all. Happy hunting.
F. Weasley
With the note is a packet of orange itching powder. It's odorless, tasteless, and turns clear when it's applied to something. Itching will be medium to severe depending on how much contact with the skin it had, and will last anywhere from three up to five hours. Will also withstand standard soothing balms, though specially brewed stronger balms will be able to quash it. Of course, by that time it probably would have worn off anyway.