Any suggestions would be appreciated!

Duff has some "electric" shades, are you tining butter cream or fondant?

I'm actually tinting royal icing.

That's always a hard color, maybe use hot pink and a tiny bit of red, I find RI is harder to color for some reason, but whatever you use, it will have to be a lot I am sure

Thanks! That's exactly what I tried first (Wilton Pink with a touch of Red-Red)... It didn't turn out deep enough. I then tried a little Wilton Violet, Americolor Burgandy and Americolor Fuscia. Everything turned out too purple-y. I decided to go with a bright hot pink. Not what I envisioned but oh well. Thanks so much!