Row colorization formula do not use HTML.
They look like this
If([# of Meetings]>0, "blue")
Laura Thacker has a nice app here with colors. https://laurahillier.quickbase.com/db/bhy8pumuk?a=q&qid=-1000683
Many of the color names like yellow or red or pink will work, but some are too intense to be readable, so you can use the hex codes in Laura's app.
If([# of Meetings]>0, "#98F5FF")
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Mark Shnier (YQC)
Quick Base Solution Provider
Your Quick Base Coach
http://QuickBaseCoach.commark.shnier@gmail.com
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