In the first chariot were red horses, and in the second chariot black horses.

red.

Zechariah 1:8 I saw by night, and behold a man riding upon a red horse, and he stood among the myrtle trees, that were in the bottom: and behind him were horses, red, speckled, and white.

Revelation 6:2-5 And I saw: and behold a white horse, and he that sat on him had a bow, and there was a crown given him, and he went forth conquering that he might conquer. . . .

Revelation 12:3 And there was seen another sign in heaven. And behold a great red dragon, having seven heads and ten horns and on his heads seven diadems.

Revelation 17:3 And he took me away in spirit into the desert. And I saw a woman sitting upon a scarlet coloured beast, full of names of blasphemy, having seven heads and ten horns.

black.

Zechariah 6:6 That in which were the black horses went forth into the land of the north, and the white went forth after them: and the grisled went forth to the land the south.

Revelation 6:5,6 And when he had opened the third seal, I heard the third living creature saying: Come and see. And behold a black horse. And he that sat on him had a pair of scales in his hand. . . .