Berries are special, tricky but special. I didn’t even know this berry existed before I moved to Regina, but it was very much used by the natives here (it was supposedly one of the ingredients of pemmican). It looks a bit like a large blueberry, though it is supposedly more closely related to apple, it tastes a bit more like black currant maybe, and once you cook it, it smells beautifully of cooked sour cherries. And it dyes. This was made from cooked frozen Saskatoon berries with alum.
Shades of blue are just the Saskatoon berry dye, and other shades are over-dyed with other colors. The dye is rather strong and tends to overpower the colors under it, but if you put it into red or yellow after the blue, shades and even different colours can be achieved. The purple egg is sappan wood over sask berries, the green ones are coreopsis and elderflower over sask. The yellow on the light-blue egg in the bottom is elderflower, then the egg was etched with vinegar back to white, and the light blue is a quick dip (maybe 5 min.) of a white egg into sask berry dye.
The question is, how long will the color last? Berry dyes tend to be not very lightfast, so I’ll need to do some experiments and wait and see what happens.