i need to colour some sugarpaste for a glass of fosters cake, any suggestion on the best colour to use
You are so in luck... I've only justtttt finished a beermug cake for my bil... picture in my gallery... I didn't color the sugar paste itself.. I actually painted it onto white sugar paste... so not sure if the same combo would work as well when you knead it in.. but anyway.. I used buttercup yellow and dark brown .... more yellow than brown.. but I diluted them in some vodka and painted it onto the fondant when it was wrapped around the cake!
Hope that helps! And good luck!