If we can find Jewish people who trace their lineage back through the line of King David we may get some clues to the color...but I like the question that the person above posed...does it matter? I think what does matter is what God has revealed about Himself. Here are a few references...
Just as many were astonished at you, My people, So His appearance was marred more than any man And His form more than the sons of men. Is 52
He has no stately form or majesty
That we should look upon Him,
Nor appearance that we should be attracted to Him.
3 He was despised and forsaken of men,
A man of sorrows and acquainted with grief;
And like one from whom men hide their face
He was despised, and we did not esteem Him.
4 Surely our griefs He Himself bore,
And our sorrows He carried;
Yet we ourselves esteemed Him stricken,
Smitten of God, and afflicted.
Jesus "Take My yoke upon you and learn from Me, for I am gentle and humble in heart, and you will find rest for your souls."
2 And He (Jesus) was transfigured before them; and His face shone like the sun, and His garments became as white as light.
And the city has no need of the sun or of the moon to shine on it, for the glory of God has illumined it, and its lamp is the Lamb.