In this instance, msg.payload = 85 and msg.ui_update.suffix = "Extreme greed"
The HTML for this line is <span>85 Extreme greed</span>
If the prefix, value and suffix were seperate items <span class="prefix"></span><span class="value">85</span><span class="suffix"> Extreme greed</span>
then they could be individually styled, eg
Well I did try, but it failed at the npm install stage, multiple times and on two different machines.
I think it ran out of swap space, then on subsequent attempts it failed to download Cypress (whatever that is).