For clear vision at a glance i like nice clear white (easily dimmable) back lighting, preferably on black or dark grey instruments with white calibration which the back light illuminates from behind.
A nice touch on my Toyota screen is very end of the speedo and rev counter needles the tips glow red which shows or reflects on the actual calibration behind too, this somehow makes it stand out better in certain light.
The switches in my lorry are all red back lit and it's utterley useless, unless you are in the first flush of youth...average age of lorry drivers late 50's...you can't see the silly little things in the dark, plus the two rows of switches are down by your left knee equals hopeless, you have to fumble for your reading glasses to make head or tail of them which is brilliant bit of design, ok for me cos its my regular vehicle and i know them off by heart, NBG for occasional user, fortunately the main dash is white back lit and reasonably clear apart from some minor info...no dipstick but still have access to an electronic version and an oil pressure gauge, as well as fault diagnoistics on dash, so able to note any intermittent falut codes which subsequently vanish which might help the workshops at inspection/service time.
I would not want a car wthout a temp gauge and very disappointed that oil pressure gauges have all but vanished.
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