I already manage a little better with the icons with your advice (https://talk.tiddlywiki.org/t/tw5-how-to-change-the-color-of-tw-icons/3753) but using a Tw code I am trying to make the icon have one color on the background another, but I can’t. This is the code I use:
<div style="font-size:0.7em;text-align:center;margin:3em auto;">
<a href="https://twitter.com/TiddlyWiki" class="tc-btn-big-green" style="border-radius:4px;background-color:#5E9FCA;" target="_blank" rel="noopener noreferrer">
@@fill:blue;{{$:/core/images/twitter}}@@
</a>
</div>
Thank you very much.