It is obvious that I do enjoy working with color, however there are some colors that just don't have the same appeal as others. For me one of those colors (besides purple!) is the entire palette of browns:
Robert Kaufman Kona Cotton ~ Brown Palette color chart here.
This will be a color challenge quilt for me when it eventuates. Brown and beige mingled with a little splash of orange/yellow (and maybe red?). I think it will work.
Do you have a color palette that you find challenging to work with?