The Celtic nations are a cultural area and collection of geographical regions in Northwestern Europe where the Celtic languages and cultural traits have survived. The term nation is used in its original sense to mean a people who share a common identity and culture and are identified with a traditional territory.. The six regions widely considered Celtic nations are Brittany (Breizh), …

Celtic studies or Celtology is the academic discipline occupied with the study of any sort of cultural output relating to the Celtic-speaking peoples (i.e. speakers of Celtic languages).This ranges from linguistics, literature and art history, archaeology and history, the focus lying on the study of the various Celtic languages, living and extinct. ...

The color defined as blue in the NCS or Natural Color System is an azure-like color shown at right (NCS 2060-B).The Natural Color System is a color system based on the four unique hues or psychological primary colors red, yellow, green, and blue. The NCS is based on the opponent process theory of vision.. The “Natural Color System” is widely used in Scandinavia.