Variable codeStylesConst

    codeStyles: "\n ::highlight(keyword),\n ::highlight(rule) { color: var(--prettylights-keyword, #cf222e); }\n ::highlight(string),\n ::highlight(attr-value) { color: var(--prettylights-string, #0a3069); }\n ::highlight(comment),\n ::highlight(prolog),\n ::highlight(doctype),\n ::highlight(cdata) { color: var(--prettylights-comment, #59636e); }\n ::highlight(function),\n ::highlight(class-name),\n ::highlight(entity),\n ::highlight(selector) { color: var(--prettylights-entity, #6639ba); }\n ::highlight(tag),\n ::highlight(boolean),\n ::highlight(property),\n ::highlight(symbol) { color: var(--prettylights-entity-tag, #0550ae); }\n ::highlight(constant),\n ::highlight(attr-name),\n ::highlight(builtin),\n ::highlight(char),\n ::highlight(operator) { color: var(--prettylights-constant, #0550ae); }\n ::highlight(variable) { color: var(--prettylights-variable, #953800); }\n ::highlight(regex) { color: var(--prettylights-string-regexp, #116329); }\n" = ...

    Prism token-class colours via CSS Custom Highlights. Drop into a Diagram.styles block so the rules reach the shadow root.