A dark desert
The (non-perforated) facing brick is unsanded. The surface may be given a frog (a slanted oblong groove). On 1 stretch/straight side and 1 front/Short side, this facing brick has a dark engobe. The structure looks smooth.
The rather neutral coloured brick has a grey base with white nuances, that are enhanced by the use of engobes. The colours shown are a near reflection of reality.