How do I change the color of my reticule?

In the winter maps I cant see shazbot cause the white blends right in. How do I change it to green? Thanks

reticule

n 1: a woman's drawstring handbag; usually made of net or beading or brocade; used in 18th and 19th centuries 2: a network of fine lines, dots, cross hairs, or wires in the focal plane of the eyepiece of an optical instrument [syn: reticle, graticule]

:closet:

:bump:

ok