Red horses (see note on Zechariah 1:8). The colours of the horses are significant, though the symbols are not undisputed. "Red" symbolizes bloodshed and war (Isaiah 63:2; Revelation 6:4); "black," sorrow and mourning (Isaiah 1:3; Jeremiah 4:28; Revelation 6:5); "white," victory and joy (Ecclesiastes 9:8; Revelation 6:2; Revelation 19:11).
What the colour of the horses in the fourth chariot means is very doubtful (see below on Zechariah 6:3).