Pick a color and try to keep track of all the objects and natural phenomena that come in that color, whether they are contrasting shoe laces on sport shoes or clouds at sunset.

Observe these objects as a logical collection, unrelated to their utility or the fact they may be components, rather than whole things. 

If you picked red, don’t just lump all the red objects together, choose a specific shade, like burgundy, ruby, or papaya.

It is easier to start with the most noticeable colors, traffic cone orange and safety yellow, which will pop out of the background all by themselves, but in time selecting more muted shades or neutrals will yield much more complex and sophisticated patterns, because a lot more pieces of reality are wearing them.

This exercise circumvents the brain’s natural shortcuts, object completion and boundary recognition, and allows you to notice the details of what’s actually there, not what you unconsciously assume there is. 

Think of it as making color constellations for your visual field. After all, this is what we do to make sense of the night sky.