#Input:
border-color: color(#111111 l(-5%)) color(#111111 l(-5%)) color(#111111 l(-15%));
#Output:
border-color: rgb(5, 5, 5)rgb(5, 5, 5)rgb(0, 0, 0);
I can repro this in the UI Next playground. I also see this with the webpack CSS Loader and minification disabled.