From tsahab; golden in color -- yellow.
see HEBREW tsahab
H6669. tsahob
צָהֹב adjective gleaming, yellow (of hair); — צ ׳שֵׂעָר Leviticus 13:30, 32, 36 (opposed to ׳שׂ שָׁחֹר 13:31; 13:37).