The synoptic gospels tell us that, at the moment Christ died, darkness swept over the land for three hours (Mark 15:33, Matthew 27:45, Luke 23:44-45). In manuscripts and painted works of art that depicted this event, color was frequently exploited to illustrate darkness and to create a dramatic setting. The celestial bodies of the sun and the moon were incorporated into the skies above the crucifixion, not only to signal darkness at daytime but also to imbue the scenes with a rich cosmological significance. Personally, it signifies to me the resolving of all dualities in Jesus. Click the images to see in full.
Curious Christian 