I love Colour Mill colours. I did, however, have some trouble with using baby blue to achieve a light blue colour recently. We (the store associate and I) thought it would be the right colour, but it went mint green when only a little was used! Darn yellow butter (yes, I beat the butter forever first). I had to add a lot of white, some royal blue, and even a tough of violet to change it to blue. Sigh. Still looking for how to make a light blue without using four different colours!