I worked on the background for the Yellow Rose a bit more this morning. The left lower petal was blending into the background too much. The problem with monochromatic quilts is getting enough contrast so you don't lose your design.
I cut out a section of the the left side of the background and replaced it with another piece of fabric. This is a shade that is several steps lighter than the shade in this sample below.
I want the quilt to read "yellow" and the darker shade put too much olive green in the quilt. Although I like the look, I don't think it works with the guidelines of this quilt challenge.