Grant,
I understand what you are trying to get to. Try going a tad darker...try the hex code that corresponds to the word Institute or the hex code that matches the blue in the robe the guy is wearing. If you don't know how to get them, say the word and I'll get them for you and send them for you to try. My eyes tell me you are pretty much at cobalt now, add some navy at you will take the brightness out and give you the desired effect.
Just my .02....
Beth