I'm not positive, but I think in principle you could use colors on LW, via CSS in the markdown editor. Could be wrong here though.
<p class="red">red text</p> <style> .red {color: red} </style>
::::: {#special .red} Here is a paragraph.
And another. :::::
either I'm doing it wrong or you can't
tried things from: https://lifelongprogrammer.blogspot.com/2019/01/how-to-style-markdown-with-css.html
I posted it on my website as I wanted to use colors, and this isn't supported on LessWrong: https://matiroy.com/writings/Signaling-importance.html Comment here.