As I promised your letters are done and it's not noon yet. :-) I didn't add any extra background around them as I don't know exactly how you'll be setting them in the border so I'm sending the extra background fabric.
They ended up pink and purple with a blue background. No matter how I played with other colors the greens and yellows just didn't play nicely with the others. And since your blocks don't have a "background" I thought it would look funny to have the only white in the quilt to be the background in the letters. So I chose this pretty light blue. I hope that's okay cause they're already done now. I would have called you and asked first but I didn't think you'd want to be woke up at 6am on Sunday morning. :-)
Got lots more I want to do today so I'll check back with another progress report tonight.