I would try Oxy-clean. I dropped a bowl of cherry jam on our creme carpet (multi-tasking and trying to get too many dishes to the kitchen at one time) and in the couple of minutes it took to grab a knife and paper towels, it had left a horrible stain. I made a paste of Oxy-clean and water, and dabbed it on part of the stain. Worked in seconds.
And this is why the DGK's are not allowed to have coloured drinks in the living or family rooms!
I too love your quilt. Was it your own design or did you have a pattern?