Isn't dark mode part of being green (or greenwashing)? By making their product or website dark by default, a company can claim to save energy and hence the plan

Isn't dark mode part of being green (or greenwashing)? By making their product or website dark by default, a company can claim to save energy and hence the planet. Maybe it can go in some report somewhere about "what we do to reduce emissions". Similarly, system clocks don't show seconds. I don't object to this as a default, so long as it's optional. It probably works as intended at saving whatever tiny fraction of world energy use. Speaking of green things, I faintly remember green and amber monochrome monitors being marketed as reducing eyestrain. I assume white phosphor was more expensive, or just couldn't be used as a gimmick.