Ok so hope I telling you correct but I remember reading this on another thread. Ok so a paints dark feathers are dark to the shaft and the whole feather will be dark.
A splash the feather can have 2 colors mixed in
someone may say that but my experience is different. i have a paint silkie rooster who follows paint genetics with his offspring yet he has a feather (one of his few solid ones-a wing one)that has a spot of black on it and also a spot of brown, he really is a tri colour paint.
splash can have larger spots-but it will be a continuum, so shades can be seen-at least on some of the splash i have seen. similar phenotypes, but paint is cleaner lines, you can tell by genotype breeding.
my paints start out often as white and get spots as they develop, i even have paints that are dominantly buff that will get a black spot later, and yes it is a partial feather. as far as i know in my paint line (silkies of course) i have no blue/splash in the genetics- i am on 3rd generation now.
i have seen 2 colour splashes too-even in duccles, but i didnt think the blue/black/splash spectrum would have nay effect on brown pigment.
I know my paints (silkies) are paint because of the size of some of their spots and their skin is mottled for a while until the pigment migrates. paint (and cuckoo) go down to the skin (people talk about 'holes' in the pigment) but splash will not have the pigment in the skin.