I’ve had all different colors of scripted test. All of witch comes from the US pharmacy. Color doesn’t mean a dam thing. Now there are certain melting points and timing for different compounds. This being said underground stuff color could make a difference but it’s pretty easy to make so the color difference most likely are the reasons said above.
As stated above. It will take on the color of the carrier oil so for cottonseed and GSO a light to darker tint but mig and MCT should be clear. Tren, EQ, and deca are the only things that I have seen with actual color due to the compound.