More about us From the world of Surrounded by Idiots
Which colour drives your behaviour?
15 everyday situations. A few minutes. One surprisingly revealing result.
You probably already recognise Red, Yellow, Green and Blue. But seeing your own behaviour clearly is harder. Answer 15 quick questions and discover which colour appears strongest and what that may mean for you.

The world behind the colours
Four colours.
Millions of conversations.
Surrounded by Idiots began with a simple idea: understanding human behaviour becomes easier when we have a language for our differences. What started with Thomas Erikson's bestselling book is now a global world of books, assessments and tools.
- 12M+
- Books sold
- 70+
- Languages
- 5,000+
- Leaders coached
Trusted by leading companies
Why four colours?
People aren't idiots.
They're different.
- Some people want the decision.
- Some want the conversation.
- Some need time.
- Some need the facts.
The four colours give us a simple language for recognising those differences.
- Red
- Yellow
- Green
- Blue
This isn't about putting people into boxes.
The colours are a language for recognising behavioural differences — not four boxes that define who you are.
People show combinations of behaviours, and the way we communicate can shift depending on the situation, pressure and people around us.
This short assessment gives you a first clue.














