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Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
@Numerist
Thanks to both of you. Very helpful. I needed the "official" rainbow colors, which seem like F00, F80, FF0, 0F0, 00F, F0F. Because on a black background 00F is nearly unreadable, I'm using 08F. 0FF looks too green.
Those'll do, although they're not ideal. Even one more bit for color would've helped.