Flag of Greece movements such as the "Etaireia", the First Greek National Assembly, convening in January 1822, took steps to disassociate itself from the "Etaireia"s legacy and portray nascent Greece as a "conventional", ordered nation-state. As such not only were the regional councils abolished in favour of a central administration, but it was decided to abolish all revolutionary flags and adopt a universal national flag. The reasons why the particular arrangement (white cross on blue) was selected, instead of the more popular blue cross on a white field, remain unknown. On 15 March 1822, the Provisional Government, by Decree Nr. 540, laid down
Flag of Greece other designs surviving until that time. No other designs and badges can be shown on the flag. To date, no specification of the exact shade of the blue colour of the flag has been issued. Consequently, in practice hues may vary from very light to very dark. The Greek Flag Day is on 27 October. The old land flag is still flown at the Old Parliament building in Athens, site of the National Historical Museum, and can still be seen displayed unofficially by private citizens. The use of the Greek flag is regulated by Law 851. More specifically, the law