3/16" Plywood Red Oak surface - Engrave on this material makes it look between Dark Brown and Dark Red.
Metal Premium Engraving - This type of Engrave will give your engrave part hight and its look darker and black.
Metal Regular Engraving - This engrave is much cheaper than premium and will give depth to your engraved part.
Laminated MDF - Engrave on the laminated MDF makes it look a very dark brown and close to the back.
Glasses and Glass Engrave - Engraving in any type of glass will make the engraved park matte but almost the same colour as the glass and a little bit white-ish.
Engraved ABS - The engraved colour will be different based on the back-colour of the ABS.