Violette is one of my favorite colors from the Color Blast collection. I own about 20 colors from them, and I love them all. The formula feels amazing on my hair; I have high-porosity 3C hair, and the biotin infusion has made a big difference in my hair. The color is vibrant and comes out a darker purple on my medium to dark brown hair. With Color Blast, I can do a two-step wash and go: water-based leave-in and color blast. The color lasts about a week and a half for me, and washes right out. No staining the hands, clothes, or shower. Transfer does happen if you play in your hair or wear a hood. My hair doesn't reach shoulder length when curly, so I have no experience with transferring onto clothing. It washed right out on my white drying towel, too. I'd say this gives a strong hold cast, and you'll need to break it after your hair dries.
I'm a lifelong fan and repeated customer of Color Blast. I'm always sad when Violette is sold out, but it's for a good reason: The product is amazing!