Hextech/Zaun thematic for art?

So recently I've been doodling concepts for a reworked Urgot. However I've run into trouble trying to actually nail down how Hextech and zaunian tech actually look. Older skins have a far simpler theme, incorporating simple metal, wood, and cloth; whilst newer ones are much sleeker, like Hextech boxes/Annie. They seem to have moved towards blue from green, and the visual theme of the technology is hard to pin down. Is there any writing or concept art I could use to get a better understanding since Zaun seems to have been neglected through most of the recent lore.