Just remembered that eye-shadow (the makeup) and "shadows-over-the-eyes" (as a character-design detail) existed.
Viewing post in Suggestions/Requests
Yeah, this is part of what we're planning for the next revamp of the face templates. Eye will be split into eyeball, eyelash, eyelid (upper and lower), iris and eye gloss/reflection. It's gonna be a big change and probably break compatiblity with older versions when the update is applied, but it should provide more options for makeup and face colors (dark eyebags included). Thank you very much for your suggestions!