I need perriwinkle and I am not even sure where to start...I mean, I know blue and purple...I think. HELP!

sky blue with a drop or two of violet maybe?

I used to make periwinkle with a couple of drops of Wilton violet, but I no longer use Wilton color. Now I use Americolor, so a drop or two of royal blue and 1 drop of hot pink or rose.

I have been using Crystal Colors powdered food coloring and they make a periwinkle color. I haven't tried it yet, but the other colors that I have tried are really nice.