Thanks! He's got the finest hair I've ever felt! But I think that might also be why he has dry skin??? But I'll definitely have to look into those for sure! Has anyone used Red D Vinity? It's pretty expensive so that's why I was thinking about just doing the paprika.
I have never heard of Red D Vinity... but I had a quick look online at it. It has quite a bit of sugar in it (molassas and pure cane sugar) soyabeans (which give a nice shine), hay, seaweed, as well as paprika. Not much other than the paprika I saw in the ingredients would darken the coat. Everything else is for shine not deepness of colour.
Also I just remembered, Black Sunflower seeds will darken the coat too - and add crazy amounts of shine. Just be aware some horses find them heating.