I have some plants that are that color when healthy.. I can't tell if it's the photo or if there's a slight fade toward inner leaf or not.
if you've been steady on nutes, i'd wager that's not it. If you've been light and you know environmental factors and pH are not off, give her a bit more. Newer leaves sometimes take a bit to fill in, too.. .so, give it a day or two and a more obvious answer will present itself.