2209WA color issues

[SeaFoam]

So I bought 3 of these bad boys, the first two are identical in color but this third one (which I ordered 2 weeks after) seems to be very 'washed out' looking. I have messed around with the colors/saturation/hue and I just can't seem to get it to look like the other two. Do I need to get it replaced or do you think it has something to do with the fact it is on the displayport instead of straight DVI?