Flat Bill, Snapback or Heavy Wash, Two Tone Cap

What are some standard matching 'rules' I should consider when choosing which cap to wear? I have baseball caps in all the basic colors, white, black, navy blue, and grey (no logos).

Men's Headwear –

The Solar cap features a modern, 7-panel construction and a snapback closure for a customizable fit.

Nobis Solar Snapback Cap - Unisex OS Red

How to Wash and Care for a Baseball Cap

Flat Bill, Snapback or Heavy Wash, Two Tone Cap

How to Wash a Baseball Cap, Snapback or Dad Hat

Quality Two-tone Flat Bill Snapback Hat - Baseball Cap by New Generation Headgear

Premium Plain Two-Tone Flat Bill Snapback Hat - Baseball Cap

unisex Flat Brim Mesh Trucker Cap | Bassdash Fishing Palm Tree Camo

Premium Plain Cotton Twill Adjustable Flat Bill Snapback Hat

Curved Hats vs. Flat Brim Hats - Discover the Difference — CityLocs

A premium classic snapback two-tone flat brim hat, Size: One Size Fits Most, Color: Gray/Navy, 80% acrylic/20% wool, Plastic tab

Snapback Two-Tone Flat Brim Hat

Men's Corvette Graphic Flat Bill Hat, Men's Accessories

How to Wash Fitted Hats (with Pictures) - wikiHow

How to Clean a Dirty Hat