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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.
@Gordon
What device are you using this on? On Bangle.js 2 you should get dithering, but other devices don't implement it.
I think the issue is you're using
g.setColor(0,0,127);wheng.setColor(0,0,0.5);is what you meant to do?