Yup... Color blind here as well. The USCG made me a Yeoman (personnel records, H/R, payroll, etc...) and planted my a$$ behind a desk for a career, instead of out on the water running the patrol boats and big cutters or flying a helicopter or airplane. As a kid I always fudged my way through, as I had memorized the Ishihara test booklet (those little colored dots where you see a "number" within the multi colored dots). But the USCG used a Naval Fallant Test and I failed instantly.

Anyway, blood in the leaves looks like dirt to me too. It's also the primary reason why I no longer bow hunt. I nailed a real nice basket 6 pointer years ago with my bow. Clean pass through, arrow imbedded into the ground 6" and was covered in red blood (I could see THAT!). But the buck jumped up, did a 180° in the air, and took off. I tried and tried to follow the blood trail and lost it. I searched and searched, and gave up the blood trail idea and started focusing on hoof prints. I searched and searched until sun set, and was just totally heartbroken.

I primarily a rifle hunter and need that 100% guaranteed... BANG... FLOP... type of hit. One shot, one kill. A .308 bullet behind the front leg straight into the chest is all that it takes.