Playing around with Blueberry fragrance so I made some blue coloured soap (and white:) I used blue ultramarine powder as my colourant in some clear soap. Since it was a powder, I added a little water to make it into a liquid colourant. Just take about a 1/4 tsp of the powder and add 1tablespoon of water, I find they mixed together really easily just by swishing my container a little. I got a really bright blue soap so I added a little white mica to tone it down. These smell really good!
And yes, I am using coffee filters again (below) on the flower shaped soaps. I just "happened" to have these white filters in my kitchen since I bought the wrong kind about two years ago! The soap pops will go in to cello bags.