2. Use meaningful symbolism.
3. Use two to three basic colors.
4. No lettering or seals of any kind.
5. Be distinctive or be related.
Let's do this.
In vexillology, this means using colours that reflect a country's culture and history. In helmet design, this can be as simple as using your country's colours. I'm looking at you, @Ericsson_Marcus and Olivier Panis.
You won't find many seals on racing helmets, but lettering? You bet. I'm not counting sponsorship logos, those are a very necessary evil. I'm talking words that don't need to be there, like names or nicknames.
"Be related" extends to the homages I mentioned in the symbolism bit, so I'll focus on "Be distinctive" here.
Make your helmet recognisably yours!
/thread