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, amazing things happen in the heavenly realm, one being the sun turning “black as sackcloth of hair” (Revelation 6:12). This intense imagery isn’t thrown in for flair alone. It symbolizes a significant cosmic upheaval, pointing to distress and chaos near the end of times.

Imagine a sun, which traditionally represents light, life, and warmth, suddenly losing all its brightness and turning pitch black. This dramatic transformation evokes thoughts of calamity and mourning within Jewish apocalyptic literature. The notion of the sun going dark resonates with similar descriptions found in the Hebrew Bible, such as in Joel 2:31, which predicts the sun turning to darkness before the great and dreadful day of the Lord.

Interestingly, many scholars link this celestial sign to the nebula-ed future events prophesied across various cultures and texts, where elements of the physical world reflect spiritual disturbances. The overall sentiment here isn’t just gloom; it’s a call to recognize that enduring change, whether it be on a global scale or within a personal realm, can lead to new beginnings.

If we look at our own centuries, severe eclipses or celestial phenomenon have often been interpreted as divine warnings. The vivid imagery of the blackened sun serves as a powerful reminder of the relationships between humanity, nature, and the divine - a theme illustrating the unbreakable connection between cosmic events and earthly happenings, highlighting the delicate balance of existence.