The old factory red ramp wasnt very bright. Its better than blued steel, but not great. The old hack of using fingernail polish is a valid option for the front sight. After trying one brand of bright orange polish with a white undercoat, I tried the Salon Perfect "Traffic Cone" orange, its brighter in low light than the fiber optics Ive compared it to. Ive painted all my carry pistol sights (including the old 29 with factory red ramp) and winchester carbine sights with it. I carry them daily when in my normal habitat in the evening, and after a year or two am still awed by how well it shows up in dusk conditions. It can chip and wear some after months of pocket or holster carry, a little dose of acetone on a rag or paper towel and a new coat of white and orange and its back like new.
It makes the blued Vaquero a workable option for dusk skunk patrol duty, the worn blue sights pretty well disappeared well before good blued sights did. Now I can see the front long after regular blued sights are history for the day.