I make my own MMF & have a problem when trying to make grey. I add the Wilton black gel paste coloring to it & every time it ends up turning purple-ish. HELP!

As I remember just letting it sit for awhile (like overnight) helped take that purplish color away.
Or maybe try adding just a tiny dot of blue.

add blue

Add yellow.

Thanks! I'm getting different answers from everyone, so I guess I'll be trying them all!