Eco use of Colour
There is a school of thought that energy consumption is linked with colour schemes. According to Scientific American, LCD screens use significantly more energy to display dark colours than lighter hues. To compound the issue, OLED screens use very little energy to display black. Ancient CRT screens also use more energy to display light colours. That's before we look at LED, QLED, ELD, E Ink, PDP, AMOLED and other technologies.
With so many display technologies abound that it is impossible to choose a uniform eco-friendly colour scheme for all screens.
That's not to say colour shouldn't be a consideration... especially if OLED is the future.