Let's say I have about an ounce of a very dark blue Pro-Tec powder paint in a 2 oz cup. And let's say that I want to make the paint a sky blue or "Carolina Blue" as in UNC. I'm not a fan, I'm just trying to have a point of reference as to the shade I'm looking for. So to make the 1 once of very dark blue into a sky blue, how much white should I add? It doesn't have to be perfect, but I need a kind of starting point. Something to go by.

Thanks

GF