Theoretically WB adjustments from what little I gathered recently “makes sense” between ~1677K and 25000K. I don’t really know if current white balance code can handle values below 1901K though (those are hardcoded).
Maybe a bit. But I’d rather have option to turn it on/off since ever enabling it helps me visually and “feels” right. Regardless whether temperature slider is blackbody radiation or fake lightroom-like And whether R/G/B sliders actually represent what they do in extreme ranges (in small adjustments they actually work as “expected”, shenenigans happen with extreme differences between coefficients). TBH it’s also true for all other sliders, meaning extreme “blue” will turn image magenta, extreme “green” will turn image yellow, extreme “red” will turn image pink/violet…
The solution to that might be similar to what @guille2306 suggested, eg “what would happen with white if it were to pass though pipe with those coefficients” That could create a bit more meaningful visual indication.
Or go with “those are just coefficients, so numbers, not colors. as in ‘patch size’ not something you have color for!”
To each his own regarding aesthetics, but seriously this is kind of visual guide that actually helps me. I do enable/disable it via option, so it isn’t as with lightroom options of “get f*** if you want to change something” And honestly that adds very tiny amount of clearly separated code.
All sliders can be done that way though. But that isn’t good UX at all. Hell, I personally don’t want to move any slider that has no color/tooltip.
To quote some comedy scene (so nobody gets offended, it’s a quote): “You Bastard! You complete absolute bastard!”. Thanks. I hate it.
Now I see it EVERYWHERE and hardly anywhere is it “right”. In color balance it’s mostly right, in tone equalizer, simple tab it’s totally right, but masking tab has it (imho) a bit wrong, exposure has it wrong on cliupping threshold, highlight reconstruction has it wrong, white balance has it wrong everywhere, local contrast has it wrong everywhere, sharpen has it wrong everywhere, haze removal has it partially right… AAAaaarght!!! And I’m yet to check what it should do/show/indicate and your remark alone made me question it on every slier!
How about color for temperature of illuminant + tint? Those do have color at that point though!