Hi there and
to the forums!
There are several yellowface mutations:
Yellowface I, in which a light yellow stays in the mask feathers (face) and does not bleed into the body color
Yellowface II in which yellow bleeds into the body colour, making most or all of the bird's feathers turquoise
and Goldenface, which can be single or double factor.
Single Factor goldenface, which is the same as yellowface I except for a darker yellow.
Double Factor goldenface, which is the same as yellowface II except for a darker yellow.
Although Yellowface I and Yellowface II can also be double factor, DF Yellowface I actually makes the face white, and DF yellowface II looks very similar to SF golden face, so they're more difficult to discern and not pertinent to your question.
It can be hard to tell if the bird will be DF goldenface or yellowface II before the first moult, as that is usually when the feathers change.
However, the feathers turn a beautiful shade of sea-green, not the bright green color you saw in Ocean's photos. The second photo, showing Ocean after he had grown up, is misleading, as it was taken with a flash, which brings out the green iridescence in his feathers. In "natural light", Ocean was most likely turquoise green.
If your budgie does have one of these mutations, his feathers will be a bit more green after his first molt, but not true green-- seafoam green is the best way to describe it. I have a budgie with this mutation (she is sky blue opaline yellowface II), so here's some photos of her now, with flash and without flash. She used to be powder blue when she was younger.
I hope that helps
Your little one will be gorgeous no matter what his mutation.
Meanwhile, be sure to read through the links provided above by FaeryBee, which include the forum's many Budgie Articles and "stickies" (threads "stuck" to the top of each subform for easy reference) to ensure you're up to date on all the best practices for budgie care!
If you have any questions after reading through everything, be sure to ask as we'd love to help