Scab is a deep brown scab tone blood. It has a dominant brown/yellow tone to it. Scab tone can be used alone to create true blood crust effects or mixed in with other Transfusion blood tones for shade adjusting. This provides a whole other spectrum of various blood tones such as drying, old or aged blood.
Dark Blood is the perfect match when needing dark horrid blood. It works remarkably well when recreating dead and undead characters. It provides a deep dark blood tone with a hint of brown and blue undertone.