The color in oil I get is used to tint oil based paints at Dunn-Edwards Paint Corp. It is not the Universal Colorant that most paint stores use. That said I think the company that manufactures D.E. colorant also makes the stuff that many industrial paint manufactures use such as Rustoleum, International, Val Spar, etc. It works fine in lacquer or in lacquer thinner. The solvents in lacquers are hotter than oil base paints so it disperses fine. I would be careful about mixing really dark pigmented colors because of the amount of colorant need it would probably wind up flocculating out of the base. On dark colors I would suggest aniline dyes. Also remember anilines and metallic dyes are more color fast.