'Mixed' in the Bible

I saw in the night a man on a red horse, between the mountains in the valley, and at his back were horses, red, black, white, and of mixed colours.

And in the third, white horses; and in the fourth, horses of mixed colour.

The carriage in which are the black horses goes in the direction of the north country; the white go to the west; and those of mixed colour go in the direction of the south country.

And a mixed people will be living in Ashdod, and I will have the pride of the Philistines cut off.