In that scenario, assuming a 50/50 population split of blue/green people, should you aim for having 50% of each employed at your company or are you justified in hiring fewer blue employees?
For a 10% difference? Unless you are employing a huge workforce where intelligence and peacefulness are the key features, I think you should be aiming for 50%. There are vanishingly few professions where you'll notice a 10% difference in IQ.