Garmin Edge 1040 Datafield aesthetic

Hi,

I'm trying to replicate the aesthetic of the default Garmin Edge 1040 Datafields. My goal is to change the background color according to HR / Power zones.

This is my current result:

As you can see, I'm not that far from the original layout, but the smalls differences drives me nuts!

So I was wondering if there's a solution to slightly increase font size and if we can use the heart and power icon in labels?