Here is all you ever wanted to know, and then some:
https://www.usna.edu/UniformRegs/Chapter2-DescriptionOfUniforms/summer-white.php
Summer white, short sleeve is the uniform your Mid was wearing during PPW.
This is not to be confused with "Dress White" (colloquially known as "Choker Whites" because of the standing collar).
The "Working Blue" uniform is a dark blue (Okay, it's black, but it's called "blue").
This week (for instance) they were wearing the working blues to classes.
Technically, the service uniform (that's the Khaki one that I haven't even talked about!) is the one that you would normally wear every day, and then switch to the working uniform when you are going to be doing something that may soil your service khaki uniform.
Someone can correct me if I'm wrong here, but the "everyday" uniform of the day for all Midshipmen is the Working Blue uniform.
If they venture outside of Bancroft Hall, you will
typically see them in Working Blues.
This of course, can change with the "Plan of the Day" in which another uniform is prescribed.
If you really want a photo of every single combination they could possibly wear, go
HERE and download the PDF. There are 139 pages of it.