It doesn’t even have to look the best or even appeal to your sense of style.
Mine would have to be Clouds at Sea. Simple but it conjures an image of an ideal day out on the open sea.
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D1 Ascendant Plane or Superblack with green chroma. D2 shaders can suck it until they give me an actual full-black black. Amethyst Veil is the closest you can come and it's super picky about which armor pieces don't end up with that nappy blue (that is nowhere on the shader icon btw).