I have had Crocus in the past, they were just a cheap mix bag that that had no way to tell what color was what. 95% purple, 4% yellow, and a single one turned out white.
Purple always comes first, then yellow and as the purple fades out, the white one shows up. This time I planted the three main solid colors, but my purple ones didn't come up like my old ones did. Instead, this yellow bloomed first, but the others did eventually come up and bloom. I figure out, I planted them the same depth as Tulips and Hyacinths so because they were deeper, they grew differently. White came second, and purple bloomed last, and I have right now, all three colors blooming together. Some yellow are still yet to bloom but they probably will. The one noteworthy exception about the yellow is how almost all of them have two to four sprouts and flowers, which is a bonus.
The only con I have is that the packaging has difficult to see information and only the product number, no color, nothing else. I got multiple packs so it was important to me to know what was what while I was planting, so I had to create a workaround to get my planting plan to work correctly.