and you have not once mentioned slow rendering times or sluggish performance otherwise
these things are subjective if you have no benchmark to compare them with. or no other expectation

Click image for larger version. 

Name:	blender sysreq.png 
Views:	122 
Size:	74.8 KB 
ID:	126133

it will make a difference

....

but as the main query is regarding colour, the monitior and the render settings are the place to start as has already been said

I thought of cataracts too - if a medical issue exists, then I would be looking to advice from a [medical] professional in the use of computers for such purposes...