Some techies in Seattle may like up to 50 shades of grey, but at Kerika we try to stick with just three:

This is easier said than done: there’s a lot of grey in the Kerika user interface, and as we add new features or tweak old ones, it’s easy to slip and introduce new shades of grey.

So, periodically, we need to take digital color meter and examine the Kerika UI in detail, pixel-by-pixel, to look for stray shades of grey.

Limiting the palette of grey to just 3 shades is an example of how constraints can help designers.