Just so everyone knows colorblind people still see the correct color, it's just easy to lose site of a blooddrop on brown leaves which actually have a red hue themselfs. The colorsblend real easy. Do you remember the part of the eye test where the doctor shows you pages in a book that has a circle filled with red or green or brown spots and inside that cluster of spots there's a hidden number. Not really hidden though because it jumps right out at you. Well those of us who are colorblind don't see those hidden numbers, same thing happens with a blood trail.