Triple screen colour match

[Kalleus]

I have recently got 3 asus monitors but are all different models. They are all different colour on screen. I was hoping someone could help me fix this so they are the same/similar
2 aren't too bad but the other is really darker even at full brightness

 

[James Mason]

http://www.lagom.nl/lcd-test/
You'll have to adjust the monitor settings, since they're all different models, the way to do it for each one will be a little different.