@startuml !include <C4/C4_Component> [A] [B] ' update the style of default relation, it has to set both properties (combined statement not working) !unquoted procedure UpdateRelStyle($textColor, $lineColor) !$elementSkin = "skinparam arrow {" + %newline() !$elementSkin = $elementSkin + " Color " + $lineColor + %newline() + " FontColor " + $textColor + %newline() ' !$elementSkin = $elementSkin + " FontColor " + $textColor + %newline() !$elementSkin = $elementSkin + "}" + %newline() $elementSkin !endprocedure UpdateRelStyle(red,blue) !function $elementTagSkinparams($element, $tagStereo, $bgColor) !$elementSkin = "skinparam " + $element + "<<" + $tagStereo + ">> {" + %newline() !if ($bgColor != "") !$elementSkin = $elementSkin + " BackgroundColor " + $bgColor + %newline() !endif !$elementSkin = $elementSkin + "}" + %newline() !return $elementSkin !endfunction $elementTagSkinparams("component", "", "green") !$msg = "bla" + %newline() + "bla" A --> B : $msg @enduml Submit amiga aws-orange black-knight bluegray blueprint cerulean-outline cerulean crt-amber crt-green cyborg-outline cyborg hacker lightgray mars materia-outline materia metal mimeograph minty plain reddress-darkblue reddress-darkgreen reddress-darkorange reddress-darkred reddress-lightblue reddress-lightgreen reddress-lightorange reddress-lightred sandstone silver sketchy-outline sketchy spacelab spacelab-white superhero-outline superhero toy united vibrant       🎉 Discover the future PlantUML Web Editor! 🚀  PNG  SVG  ASCII Art