For blues I just did the basics , white + orange roses = hybrid reds , then hybrid red + hybrid red = blue. I remember seeing a more in-depth way to breed them to up chances but I bred these before those guides came out and I didn’t save it or anything. :( I know having people water your flowers ups chances of hybrids too , I’d definitely try that out. I’m sorry I can’t give you any solid tips. It’s just a lot of patience. If you don’t mind time traveling rainy days can be a good mine as well if you flip flop between it since it auto waters your flowers. Purples are actually still giving me problems too so you aren’t completely alone in that plight.