What color for sight outline/highlight...

I have the 2300 SS configuration where I want it and I'm going to finalize the build. I made a higher front sight and wonder what colors others find make their front sight the most distinguishable in bright and low light conditions and against different color backgrounds.

Anybody think there is a "best all around" paint color. I'm not going to use a "glow" sight, I'm leaning towards red or yellow but wonder if anybody has settle on one after trying many others. I've tried my share and nothing jumps out at me as best all around.