You mean something like this? I'm half color blind, but I think this is ok.



ImageShack didn't work for me so I used some shitty host that ruins the quality, but you can at least see what I have done.

Hue/Saturation:
Reds:
Saturation: -28 (clicked on one of their faces to get the right red value)

Colorbalance:
Cyan: -28

And then a slight curves adjustment to get just a little bit more contrast. All the tools can be found under Image > Adjustments or Layer > New Adjustment Layer. Adjustment layers are best as you can go back and change the values later.