Opaque?

[sallyanne]

Another way to make things look more realistic is to introduce shadow and light on your flat color

The less flat a drawing looks, the more real it looks.
Step 1: Draw a Smooth Base Layer. ...
Step 2: Add Darker Values. ...
Step 3: Blend with Base Colors. ...
Step 4: Continue to Darken Values. ...
Step 5: Blending Layer. ...
Step 6: Keep Layering and Blending Until the Drawing is Finished.