The term 'Color experiment PT color' refers to an experiment involving the use of a specific color, possibly within the context of a scientific study or an art project. PT color typically refers to a color in the context of pigments or dyes, often associated with a particular chemical composition. In a color experiment, PT color could be used to study the effects of light, color mixing, or the interaction of colors with various materials. More specific information would be needed to provide a detailed explanation.