The store has this exact same color - shown on the website - in stock, if they carry it; I've also seen other people wearing this shirt in public before.
Order it online, however, you may or may not end up with a darker variation of the shirt, that's predominantly a darker blue than what's shown on this item's page.
Just a fair warning for those ordering online; not even a problem if you don't mind a darker variation; it's still blue.
Otherwise, it's still a very creative, distinct pattern, and the color's modest, so if you want something different, without standing out too much, this's definitely a good choice.