'Color' in the Bible

The satraps, the prefects, the governors and the king’s counselors gathered around them and saw that in regard to these men the fire had no effect on their bodies—their hair was not singed, their clothes were not scorched or damaged, even the smell of smoke was not on them.

Then the king’s face grew pale and his thoughts alarmed him, and his hip joints went slack and his knees began knocking together.

Then King Belshazzar was greatly alarmed, his face grew even paler, and his nobles were perplexed.

The queen entered the banquet hall because of the words of the king and his nobles; the queen spoke and said, “O king, live forever! Do not let your thoughts alarm you or your face be pale.

"At this point the vision ended. As for me, Daniel, my thoughts continued to alarm me, and I lost my natural color, but I kept quiet about the matter."

and I was left alone to observe this magnificent vision. Nevertheless, no strength remained in me my face lost its color, and I became weak.