This drawing was done about 8 years ago. One of the things I love most about working with oil paints, water colors and to some degree acrylics, is the ability to use transparency. It makes the image more appealing and draws the eyes of the viewer in.
This is a look that can be replicated in the digital world. by letting some of the background "bleed" through. Basically by lowering the opacity, every color can potentially be a transparent color, no need to look at the label! (I'm looking at you brown pink)