Colour temperature issue on dual display port

I've got a Elitedesk 800 G3 paired to 2 HP monitors : EliteDisplay E240 and EliteDisplay E201.

Both monitors are plugged into the DisplayPort.

No matter what settings I've tried I cannot get the colour temperature to be close for both monitors.

I do realise the size of the monitors are slightly different (21" vs 23") however the difference in colour temperature is too great which causes discomfort.

Any ideas to resolve?