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There’s a few different sets of ansi escape sequences for managing colour. The ones you’re on about are the 8/16 colour palette. Unfortunately there is a trend

There’s a few different sets of ansi escape sequences for managing colour. The ones you’re on about are the 8/16 colour palette. Unfortunately there is a trend these days for developers to use 8-bit (256 colours) pallet or even the true colour (24-bit). Both of the latter are not customisable in the terminal. Coincidentally I’ve gone into rants a number of times in the past on here about developers not using the correct colour palettes and the answer I always receive back for why it’s ok is because “developers should be able to chose how their application looks like”, which is fine if they control the entire design stack like they would on a website. But it makes zero sense in the terminal.

brundolf 5y ago
Interesting, I didn't realize both kinds of control characters existed [checks the color library I'm currently using to build a CLI]
tetha 5y ago
That makes sense. I've been wondering if we've been doing something subtly awkward with our internal tooling. However, most are just using the 8 or 16 color palette with a simple convention like "Use red (or technically, color 1, which just happens to be red for us) as error, yellow as warning, green as success" and let the terminal theme and the user figure out how it should look on their screen.