The answer is: It became black as sackcloth of hair

Rev 6 vs 12

When the sixth seal is opened in the Book of Revelation, a profound and dramatic shift occurs in the cosmic order. The sun turning black as sackcloth echoes themes of mourning and cosmic distress. Sackcloth, typically made from goat’s hair, was historically worn by people in deep grief, especially during times of calamity. This imagery captures a sense not just of literal darkness but also of despair.

Throughout scripture, darkness is often a symbol of judgment or a harbinger of significant change. This isn’t confined to Revelation; it can be seen in events like the plagues of Egypt or even at Christ’s crucifixion when darkness covered the land for three hours. Each of these instances signifies upheaval and marks turning points in the biblical narrative.

Interestingly, with the sun going dark, it invites reflection on the cycles of light and darkness found throughout scriptures. From the creation account where God separates light from darkness (Genesis 1) to the prophetic visions of a restored creation where the sun will no longer be necessary because God's glory will provide light (Revelation 21:23), these themes tie the beginning and end of the biblical narrative together.

This symbolism also encourages us to consider our own moments of despair. Just as darkness passes, hope into renewal awaits—an echo prominent in many spiritual traditions that emphasizes resilience and emergence from trials. So, while the sixth seal portrays a grim picture, it reminds believers that darkness paves the way for the dawn of new beginnings.