Default What rom is this???

this is a screenshot of a friends galaxy s2. i couldnt make heads or tails of it! it looks exactly like stock, but the pulldown power widgets are blue instead of green, and the statusbar icons are different! attached is a screenshot of system information, can anyone tell me which rom this is??
also, the phone is not rooted, which leads me to think that its not just a random mod, and my friend told me that thats how the phone looked out of the box.
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