Britain’s Deputy Prime Minister Nick Clegg has played down an incident in Glasgow that saw him hit in the face with blue paint.

Deputy Prime Minister Nick Clegg tonight dismissed being attacked with blue paint as "not a big deal". The Liberal Democrat leader was splattered with paint at a meeting with grassroots Liberal ...

For example, the paint used in Maryland is blue since the state's law was passed in 1989, according to the University of Maryland Extension. What U.S. states have the 'purple paint law'?