Use softer blacks

How to use it

Use a dark grey instead of black throughout your interface.

When to use it

Flat blacks - with a brightness value of 0 - tend to have an uncomfortable amount of contrast with other colours. Lower contrast values, like you'd get between light grey and dark grey, can be easier on the eyes than pure white and pure black.

Most users won't realise that the dark grey is not a black, but the interface will look better.

What to watch out for

You don't need to soften the black a lot to get the right effect.