Originally Posted by Canadian_JOY
Ross - w.r.t. LCD display backlight colours, take a look at human eye response to colours as we transition from day to night vision.
First colour to go is red, then we lose everything in and around the red wavelength.
Of the choices available, blue is the colour we see best at night, thus would be the colour requiring the deepest dimming capability.
For this reason white backlighting might be the best compromise between ability to see the display and ability to dim it so it's not sticking out like a sore thumb in the cockpit at night.
And it's also the most difficult color to focus on at night.