I always try and get a piece I know FOR SURE is one colour to determine what colour it is. Even then I sometimes get it wrong. Browns are sometimes an utter pain!
I've got my color palette in front of me, and if I'm to assume that the 1x4 bricks are Maersk Blue, then the 2x2 bricks, as @BasKrie says, look like Medium Blue to me (which is marginally darker). Don't think it's Medium Lavender as that would definitely be more 'purpley', and it's not Medium Azure either as that is lighter than Maersk Blue.
On the plus side if you think this is a struggle, try telling Sky Blue and Medium Azure apart!!
I would say Medium Blue - though concur with someone above - with all those bite marks, you'd need to note the bite marks in the comments and list as acceptable or recycle them if you're thinking of selling them. :-)
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but for me it shows as medium blue
On the plus side if you think this is a struggle, try telling Sky Blue and Medium Azure apart!!