We are significantly influenced by brightness.

Sun and a sunny day, make the dull seem interesting, the good seem splendid.

It would be a good idea for a handful of reasons if people wore bright colours in winter.

The arguments against this (brighter clothes get dirty more easily) are trite and irrelevant in the modern world or (cultural morays considers bright colours less “smart” or distinguished) nothing but brainwashing.

Let’s take a small leap towards progress. Brightly, colorfully.