A nice example of this is shown in Figure 2 of the paper "Illustrative Rendering in Team Fortress 2" [1] from Valve. It shows how they tried to make the silhouettes of each character class distinct and readable. (And the paper also discusses the choices that went into the color palette.)

[1] https://steamcdn-a.akamaihd.net/apps/valve/2007/NPAR07_Illus...

Then they threw all of that out the window in the name of selling hats.

In case of games, that's pretty much optional. Many games (e.g. Battlefield) take the opposite approach where spotting the enemy in the chaos is intentionally hard and a skill to master. I'm sure there are also intentionally less readable movies or at least scenes, although no immediate example comes to mind.