No explanation is given for the dark blue,īut I'd speculate that the Admiralty chose the darkest possible shade of blue so Keywords: united kingdom | union jack | gay pride | green britain |Īccording to my old stand-by, Colours of the Fleet, the blue wasĭarkened in 1869 when the Admiralty standardised the naval Union Flag at 1:2, This page is part of © FOTW Flags Of The World website United Kingdom: colour of the flag United Kingdom of Great Britain and Northern Ireland