Blue is the colour between violet and green on the optical spectrum of visible light. Human eyes perceive blue when observing light with a wavelength between 450 and 495 nanometres.
The United Kingdom is a Sovereign island country. It consists of 4 constituent countries, England, Northern Ireland, Scotland and Wales. Great Britain is the name of the island which consists of England, Scotland and Wales.The full name is the United Kingdom of Great Britain and Northern Ireland. The UK is part of the continent of Europe.he United Kingdom is a Sovereign island country. It consists of 4 constituent countries, England, Northern Ireland, Scotland and Wales. Great Britain is the name of the island which consists of England, Scotland and Wales.
England, comprising the majority of the population and area of the United Kingdom, remains fully the responsibility of the UK Parliament centralised in London. England, Northern Ireland, Scotland and Wales are not themselves listed in the International Organization for Standardization (ISO) list of countries.imilarly, the British overseas territories, remnants of the British Empire, are not part of the UK. Historically, from 1801, following the Acts of Union, until 1921 the whole island of Ireland was a country within the UK. Ireland was split into two separate jurisdictions in 1921: Southern Ireland and Northern Ireland.