Many managers — and even entire companies — tend to hire people similar to themselves.
Let’s be honest: we all like people who remind us of us.
Unfortunately, this approach isn’t just ineffective — it can be destructive for both the team and the project.
True team strength lies in diversity, in coordination between opposites, and in the synergy of different perspectives.
To build an effective team, you must understand who exactly you need — and what “pattern” of professional and behavioral traits each member should bring.
That’s where understanding personality types helps.
It reveals behavioral patterns, social tendencies, and interaction styles — crucial when you’re choosing or developing people.
The Four Core Personality Types
Across all typologies — temperaments, psychotypes, emotional models — we repeatedly encounter four universal types.
This model, popularized by Thomas Erikson in his book “Surrounded by Idiots”, provides a simple yet powerful lens for team dynamics.
🔴 Red
You can spot a Red instantly — not because they seek attention,
but because they radiate drive and urgency.
Reds move fast, speak directly, and see downtime as wasted time.
When the task excites them, they’ll go through fire to get it done.
If it doesn’t — it goes straight to the trash.
For them, speed equals quality.
They’re ambitious, energetic, and allergic to small talk.
They expect precision and action.
Red Behavior:
- Keeps distance, firm handshake
- Strong eye contact
- Assertive gestures
- Loud, confident voice
👉 Get straight to the point. Start with results, not introductions.
Reds care about the present — here and now.
🟡 Yellow
Life is a celebration — and Yellows are its hosts.
They radiate enthusiasm, connect easily, and see opportunities everywhere.
For them, problems are puzzles waiting to be solved.
They inspire others through optimism and creativity.
Their energy is contagious — they pull people toward ideas.
Yellow Behavior:
- Talkative, expressive, engaging
- Friendly facial expressions
- Close proximity and vivid gestures
👉 Yellows thrive in an inspiring atmosphere.
Give them space to create — and they’ll find solutions when everyone else gives up.
🟢 Green
The calmest and most reliable type.
Greens are listeners, mediators, and team stabilizers.
They value harmony, predictability, and trust.
They dislike conflict and resist sudden change.
They may not be the most innovative, but they are the most dependable.
For them, “WE” matters more than “I.”
Green Behavior:
- Calm movements
- Gentle eye contact
- Controlled gestures
- Relaxed posture
👉 Greens need time to adapt — but once they do,
they become the team’s backbone.
🔵 Blue
The analyst, the perfectionist, the thinker.
Blues are detail-oriented, structured, and methodical.
They don’t seek fame — they seek accuracy.
They analyze before acting, double-check everything, and care deeply about process integrity.
For them, the path matters more than the goal.
Blue Behavior:
- Keeps distance
- Minimal gestures
- Controlled facial expression
- Calm, logical tone
👉 Blues bring order, rules, and systems —
they turn creative chaos into working structure.
⚖️ Balance Is Everything
No one is a “pure color.”
Each of us combines two dominant and one supporting type.
Too many Blues — and the team lacks drive.
Too few Yellows — and creativity fades.
No Reds — no breakthroughs.
No Greens — no stability.
Imagine a Green project manager handling a demanding client — they’ll think endlessly about client happiness, but forget about profit or workload balance.
Or a team full of Yellows — full of ideas, but no one to execute them.
👉 Choose people for roles, not just for skills.
Visualize your ideal candidate, communicate clearly with recruiters, and assess not only hard skills but soft compatibility — thinking style, emotional rhythm, teamwork habits.
Finally, mentally “place” this person into your existing team and observe what happens to the group dynamic.
That’s how you build a dream team.