I'm working on developing a new world, Qorim, and these are the first three in the series.
The first is a Sun Knight, the second is an Earth Knight and the third is a Sky knight. I'm going for a more non-traditional knight, imagine a higher class of warrior selected by the respective priest of different elements (Earth, Sky, Sun, Water, etc) given a mix of ceremonial, political and military responsibilities.
The Sun Clan lives for war and glory, its knight wearing ceremonial dyed furs and sporting tattoos and patterns reminiscent of the sun. The Earth Clan retains its strength and culture from being close to nature, many live for the hunt, and their knights stick with light dyed cloth and ceremonial tattoos often depicting leaves, trees, plants, etc. The Sky clan is comprised of traders, merchants, noblemen, mages and diplomats, with more vibrant patterns and colours the Knights usually opt for more ceremonial, less practical clothing as they rarely (if ever) see battle.