Roan is actually a coat pattern that can be combined with any colour. However, different "colour" names are given to roans depending on their base colour.

The body is coloured with white hairs ticked through the coat. The colouring on the body can be any colour and different names are given depending on the base colour. For example a Chestnut Roan is referred to as "Strawberry Roan" and a Black Roan is referred to as "Blue Roan".