My m67 has an orange front sight insert. For many years I would paint over it with flat black paint as I felt it helped with sight picture on b3 targets indoors as most of our club matches were set up. Last year I thought the orange against a black target outdoors might be better, but now I'm not so sure.
I'm also doing mainly steel swingers outdoors nowadays which I paint orange so that kind of doesn't work so well. Any toughts?