From yereq; paleness, whether of persons (from fright), or of plants (from drought) -- greenish, yellow.
see HEBREW yereq
H3420. yeraqon
יֵרָקוֺן noun masculine mildew, paleness, lividnees;
1 mildew Amos 4:9; Deuteronomy 28:22; 1 Kings 8:37; Haggai 2:27; 2 Chronicles 6:28 (all "" שִׁדָּפוֺן).
2 paleness (of face) Jeremiah 30:6.