Gamma Machine
From Acitius Wiki
The Gamma Machine is a machine operated by Victoire the friendly mutant. Bringing a Gamma Potion to fuel it will allow you to change the hue, saturation, and brightness of your characters' coloration. In order to entice more victims, Vicky allows you one free use of the machine. Alternatively, you can buy a Gamma Orb, which requires Webshop Gold, and get unlimited 'gammaing' for all of your characters.