.multi-color {
--border-top-width: 10;
--border-right-width: 20;
--border-bottom-width: 30;
--border-left-width: 40;
--border-top-color: red aquamarine;
--border-right-color: lightskyblue green lightskyblue green;
--border-bottom-color: deepskyblue cyan lightgoldenrodyellow;
--border-left-color: gold orange red pink;
}
.two-toned{
--border-top-width: 2;
--border-bottom-width: 2;
--border-color: midnightblue white;
}
.with-offset {
--border-width: 6;
--border-color: white lightgray white;
}
Based on Houdini Samples solution