My point is that Navy Blue is Navy Blue. It has its own color code. And a darker or lighter shade has its own name and code. No such thing as "shades" of Navy blue. Keep in mind, Navy Blue against white, vs. gold, vs. pink can look different. Check this out:
Blues Hex Color Codes: Hexadecimal codes for named colors used in HTML page features. Can you tell the difference between Cyan 2, Cyan, and Aqua safe?
Can you tell the difference? You might be able to notice a difference on splotches next to each other (as you posted), but not when you actually see the color "in action" especially when paired with another color (blue/gold, blue/orange etc...)
I completely agree that interpretations of color can be flat out wrong.
I was in charge of ordering uniforms for many teams. I learned quickly that many vendors and artists don't know what true colors are, or they are just trying to get rid of unsuccessful paint. A 4x4 in splotch might look good on that splotch, but folks can become amazed and angry when that 4x4 inch splotch covers an entire room, or uniform. Each color has its own color code and name. I also found out that if I wanted a royal blue look against white or gold, I might have to change my color code of blue in order to make it look royal vs. white or gold. What you posted as Navy, in my mind is closer to Royal...
I had asked specifically for royal and gold for a team uniform one time. The damn company sent us purple and yellow. I checked their color code book and dang it, they gave me a loose interpretation of the color code. It came out purple and yellow. I rejected the uniforms. That company lost mucho dollars because they printed an entire set of unis and jackets and sweats without asking for my approval on the final print of a single uniform. I was willing to spend the 100 bucks to check out a single uniform. Their bad..
I called my favorite car color Midnight Blue. Put a Navy Blue item next to a #10 gray (black), and you will see the obvious difference.
I like the shirt though. But I prefer simple grey (maybe a #4 or #5 grey, with Notre Dame printed on front. Nuff said. (I will buy this new shirt when I get the chance...lol)