count me colorblind...just takes more looking for shapes that are not normal to the pattern you are looking at, same way I find elk and deer...

I wear yellow glasses as you will see in the pic...but this bull took us 7.5 hours hands and knees searching for just pin pricks worth of blood...and all that was after waiting 2 hours...

So, even Colordblind people can track, they just need to get comfy what they are looking for...and it will be more of the shape than the color...

Generally speaking, I think this has been an advantage for me in hunting, as I see the odd shape instead of the colored things...