Nativity Silhouettes

Painting can be messy, but oh, sooo fun!  In this project, students were introduced to value.  I followed Sandra's Savvy Teaching Tips to create the backgrounds.   That Artist Woman uses a similar procedure, so, I've added both links. 
For the silhouettes, I simply googled "nativity silhouettes" to find the images pictured below.  Ideally, the images are to be traced on black construction paper and then cut out; however, since I did this with younger students, I chose to simplify it by merely having them cut out the printed images.
As you can see, we used two different tones of blue for our projects.  I'm not sure which I like best, the warm or cool blue.  What do you say?