I designed the 12-bit rainbow palette for use on https://grid.iamkate.com. It consists of twelve colours chosen with consideration for how we perceive luminance, chroma, and hue. The palette uses a 12-bit colour depth, so each colour requires only four characters when specified as a hexadecimal colour code in a CSS or SVG file. For more details, see https://iamkate.com/data/12-bit-rainbow/
National Grid: Live

Shows the live status of Great Britain’s electric power transmission network

@katemorley hm, now I want to figure out using these for a terminal/editor theme.
Terminal is relatively straightforward and I think they work well. An editor theme is going to be more complex, of course And it's slightly arbitrary which colour is the "bright" one, since the whole point is that none of them are brighter than the other.
actually that blue on a black background isn’t great, not enough contrast.