I had that similar request a few years ago - but rather than certain colors - it was
Brights. This is what I did
http://www.quiltingboard.com/picture...t-t134673.html
That one was square.
One QB member and I had chatted on line and she really liked it but wished it were rectangular - this is what I came up with for her - this one is 45x60
[ATTACH=CONFIG]483032[/ATTACH]