A 'contrasting' color will normally be best. If the light is bright and your target well lit, then you can simply use the black reticle. I prefer a green reticle when there is red light and vice/versa. The scope on my daughter's rifle will let you pick between red or green, I like that feature. All of mine are red only.
In any case, be certain the scope offers a level of illumination that is low enough (under low light conditions) that the reticle does not compete for your focus on the target. If it is too bright, it will tend to 'wash out' your sight picture.
Edited by flintknapper (10/04/15 05:23 PM)
Spartans ask not...how many, but where!