Our own Barnbum made her beautiful floral watercolor log cabin using narrower lights and wider florals.
http://www.quiltingboard.com/t-23211-1.htm
It's just gorgeous, so I remembered exactly what you were talking about! It was already bookmarked on my computer. Note: she mentions Judy Martin. I have Judy Martin's log cabin book, but even though it has lots of great tips for log cabins and some beautiful patterns, this one isn't in there. So maybe it's in another book.