I’m having problems darkening Rose’s fondant recipe.  I’ve used both powdered and liquid colors and in both cases, the fondant becomes the wrong consistancy.  Does anyone have any suggestions?

I made it for the first time a couple of weeks ago and I used gel colouring to make 3 different shades of pink for a cake for my grand-daughter.  It turned out quite well, the fondant and the decoration could have been better but the colours were very good.