Using a solid color background on really makes monochromatic images pop off the canvas. I used an acrylic spray paint for most of this one. The Stallone I wanted to give a really serious look so I did in greyscale only.LOVE these. The Stallone was is all together incredible. I think it would be cool to add a solid color background to him. Just an opinion. You did a great job on the second one too. (Alyssa Milano, I think?) Especially on her mouth and teeth. Nice work.