I am trying to update the coloring of the icons in the header for the MediaWiki Vector 2022 template on my Wiki, but I can’t seem to figure it out.

I’m attempting to call a template from within a template. The value of the parameter I’m passing contains a forward slash and I want to replace that slash with a pipe so that it divides the value into two parameters.

I am very new to mediawiki and ddeveloping with it.