Pixie, the new dk. brown is way different from Naturalism. You might see a similarity with the Architecture, tho....I think that's the one. Another warm brownish shade. Not as dark tho. Now you have me thinking I need to hoard another tube of Naturalism! But if you liked it, you'll like a few of the new colors, too, I think! I'm a fan of nude/brown colors because I have brown eyes.