I guess I can add compatibility to it, The base of the code is available in this official plugin : discourse-bbcode-color/assets/javascripts/lib/discourse-markdown/bbcode-color.js at main · discourse/discourse-bbcode-color · GitHub
I’ll think about it. I probably won’t add a button tho 
I’ve added support for these bbcode :
color=
size=
small
floatl
floatr
floatc
left
center
right
justify