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Oooh, more Librarians icons! :D

(I liked the first one you posted a lot, too!)

I very much like the coloring in this one! The green contrasts beautifully against the yellow and the dark purple of his suit. Great choice!

One tiny thing: the lines around his face are a little sharp. I'd maybe blur them slightly, just a little bit:

I haven't found a better way than to stamp the whole icon into a new layer, then blur the stamped layer, then give it a completely black mask, and only unmask the few places where you see pixel artifacts. (On the right side of his face, and the top of his shoulder.)

Or you could try removing the sharpness in an earlier step, by smoothing the selection (if you have masked him at all in this icon). It took me years to find the "Refine Edge" feature, but it's pretty useful!