I made a theme based on a gradient from avocado green to cobalt blue for Bumblebee-status, Polybar, Rofi, and a Gtk theme in Themix.
The icons have been on my system for several months and are staying there into the foreseeable future, so might as well have fun and experiment.
It's a system:
In Nemo with a highlighted folder, Alt+Enter > Shift+Tab then spacebar and either a preset icon is what I'm looking for from typing a keyword or I browse my system.
E.g. my photos subfolders are organized by the camera with iconized transparent GIF's of the cameras or other source, or iconized images from the subfolders.
