'Colour' in the Bible

Then the colour went from the king's face, and he was troubled by his thoughts; strength went from his body, and his knees were shaking.

Then King Belshazzar was greatly troubled and the colour went from his face, and his lords were at a loss.

The queen, because of the words of the king and his lords, came into the house of the feast: the queen made answer and said, O King, have life for ever; do not be troubled by your thoughts or let the colour go from your face:

Here is the end of the account. As for me, Daniel, I was greatly troubled by my thoughts, and the colour went from my face: but I kept the thing in my heart.

His body also was like the beryl, and his face as the appearance of lightning, and his eyes as lamps of fire, and his arms and his feet like in colour to polished brass, and the voice of his words like the voice of a multitude.

So I was by myself, and I saw this great vision, and all my strength went from me; and the colour went from my face.