I like those - crisp colours but not too crisp, great muted shades.
I'll take you at your word with comments thoughts, in the hope it's not unwelcome! Because faces and particularly eyes are kind of my thing, I have a nice quick cheat to paint realistic looking peepers without having to just shade them in. A lot of painters will just leave a dark line there, on the grounds that eyes don't show at long range, which is valid. I like to put them in where possible, but to make sure they're the right size and shape, I paint the eyes straight after putting a dark skin base colour on. Then I can thin and thin and thin the eyes down to narrow slits and put in the pupils, cleaning it all up with the dark skin shade. Then paint the face as normal after that. I also like to leave a darker patch under the eyes, then insert a thin slice of pale skin shade as a lower eyelid or bags under the eyes - it's so easy to do and really adds life.