Hi Kimi,
That’s a great question and one I’m working on in my experiment series. (Unfortunately, I don’t have enough experiment results yet to share.) Where the trouble comes is that clear resin itself has colors in it to achieve a final clear look. (Resins tend to be a bit on the yellow side whereas the hardeners tend to be on the blue side.) The problem is that one brand’s colorants may interact with another brand’s colors in the resin and/or hardener.
In general, I have had success using one brand’s colorants in another brand’s resin with the exception of Alumilite green. I have found despite everything curing appropriately, when used in at least two different brand of resins, it will turn blue.
At this point you have two choices:
1. When using a brand of resin, be sure to use their colorants.
2. Experiment a little, knowing you may run into a problem from time to time.