This is one of my few detailed stamp images and it is a cling mount from Impression Obsession. I used Copic markers on this version to color in everything. Once you break it down into parts, it's pretty easy to color. Copics really make the image pop.
The next photo is the same image using Koh-I-Noor woodless colored pencils, which look like this. I purchased mine at a local craft store.