Although the horse does not have much prominence in our societies nowadays due to the modern life and transportation facilities, the tradition gives to horses a symbolism of very clear nobility and good luck. It is very curious the interpretations authors give to horses according to its colors. So if the horse is white portends good news and joy. If the horse is black then it is an omen of problems and concerns. If the horse is bay (characterized by a reddish-brown body color with a black mane, tail, ear edges, and lower legs) it means elevation and dignity. If the horse is sorrel (any reddish horse with a same-color or lighter mane and tail, ranging from reddish-gold to a deep burgundy or chocolate shade) it means gray difficulties and obstacles.
Read more about dreaming of Horse in other dream meanings interpretations.