using "in srgb" in a color-mix breaks stylus

[anom]

The following breaks Stylus:
background color-mix(in srgb, black 10%, white);

The in srgb is the issue, but this is correct usage.

[pabli24]

It's a stylus preprocessor bug that you can report here https://github.com/stylus/stylus

workarounds:
https://stylus-lang.com/docs/bifs.html#s-fmt

body {
	background: s("color-mix(in srgb, black 10%, white)");
	background: unquote("color-mix(in srgb, black 10%, white)");
}

https://stylus-lang.com/docs/literal.html

@css {
	body {
		background: color-mix(in srgb, black 10%, white);
	}
}

body {
	background: @css{color-mix(in srgb, black 10%, white)};
	background: color-mix(@css{in srgb, black 10%, white});
}

https://stylus-lang.com/docs/bifs.html#mix-color1-color2-amount

body {
	background: mix(black, white, 10%);
}

I would recommend to use less preprocessor instead as it's more up-to-date with new css features
and for new people, it is less confusing to use as it has better compatibility with normal css.