Blue Dalek

Blue Daleks were non-commissioned Dalek officers. (EDA: War of the Daleks)

After the restoration, Dalek strategists were coloured blue. (DW: Victory of the Daleks, Doctor Who Confidential)

Victory of the Daleks
The specific type that appeared within Victory of the Daleks, Series 5, was unnamed but was the Dalek that talked most often, exluding the Supreme. The other Daleks only spoke once, declaring their return. The Blue Dalek seemed to also be more obident and major than the others, and somewhat keen on being near the Supreme, as it appeared at the Supreme's side when the Supreme declared the bomb and when it first came out, it came out by the Supreme's side.