Wrapping Up Color Theory - Part 2

I did some polling and based on the results I decided to go forward with the flowers on the wavy background (the one I thought I'd do). I figured once I got the colors added and submitted, it wouldn't be hard to go from here because my professor would suggest which color study to go with. Wrong. She was impressed with all four and thought all of them did a good job supporting my proposal. So, she left it up to me to choose my favorite one.

Just like I did with the grayscale thumbnails, I did some polling and I believe I am going to go with the Tetrad color strategy. I will re-evaluate it and make adjustments as needed.

Here is my color study. Which would you use?