Blood trailing and LED's

I've read about blue being the color to use for blood trailing. I've even tried it a time or two. But to me it just makes blood look black and on leaves and dirt that isn't a big help. On the other hand, I have discovered that red LED's make red objects appear brighter red. I haven't had the chance to try it on blood. Has anyone elese noticed the blue/black thing and maybe used red to illuminating blood? I am thinking that maybe a light with red and white LED's together like an Inova X5 with three red and two white LED's would be the perfect blood trailing light. Additionally, what about using UV with colored eyewear (amber maybe)? Would that make blood more visible? I'm a hunter and this topic interests me very much.