Your bird look like a violet-skyblue normal in juvenile plumage.
If your bird is a single factor violet-skyblue normal, he will have bright Cyan blue body in adult plumage.
To tell a single factor violet-skyblue, from cobalt, check the bases of central tail feathers, for turquosie colour.
See my photo of budgie central tail feathers.
I remembered I handled a adult male budgie with a very bright cyan blue body 2 years ago, so I learnt the bird was a violet-skyblue normal.
Originally Posted by budgiezforall
Hi, I've heard that these two mutations are easily mixed up, so here I am asking someone who knows a lot about this stuff to tell me if my new budgie Ushi is a sky blue violet or a cobalt. In the picture, he looks almost like plain old sky blue, but in true life he looks a lot darker. I've also heard that this is a indicator that a budgie has the violet factor, but I still need a confirmation. Here he is: