[Feature] use colour to identify "am I clear of my previous sample" at a glance

[slippycheeze]

Is your feature request related to a problem? Please describe.
When I want to check "have I cleared range of previous sample" I spend a lot longer working to read and understand a number – which often changes at least once while I'm looking, triggering a mental "restart" of the work – to determine a boolean.

Sometimes the exact number is very meaningful to me, but maybe 70 percent of the time I just care about the boolean "good or bad range"

Describe the solution you'd like
I'd like to see this one bit of information exposed through the use of colour, which would make it easy to understand at a glance, without having to understand the text itself.

I use the standard windows "white" background, so for me having the text in dark red while too close, and normal black otherwise, would work well. If the text is red I know I have to go further, otherwise it just tells me exactly how far I have gone. (Which is very valuable to know if, eg, I should give up on this direction because I've moved out of the biome.)

Describe alternatives you've considered
I considered "green when far enough", but that highlights the "everything normal, nothing to do" situation. Generally, that isn't the right choice, so using "red, too close, no colour, everything fine" seemed a better option.

I considered if using multiple colours would be useful: red, too close, orange, almost there, green, good. It was instantly attractive, because more information, right? ...but then I thought, "what do I do when it switches red to orange?", the answer being nothing, of course. It is information, but there is no reasonable action to take from it.

I also considered if some extra indicator, like a little square of colour, or an outline, or an image of a checkbox, might work better. I don't think so, but they are certainly valid options, and would probably meet my needs fine. I just like the coloured text idea better.

thank you. :)