Were the Ancient Celts colour blind? Place names suggest they were. Different languages label colours in different ways. White and black are words that exist in all languages but if there is a third colour name it is always red. The fourth and fifth colours can be green or yellow , but only languages that have six different colour words will have one for blue . All The Colours, Including Grue Languages without blue will use green instead. These languages are called grue languages. Unlike their modern versions the old Celtic languages (Welsh, Breton, Cornish, Cumbric, Gaelic) were grue languages. For example, the word glas found in all four of these languages meant grey or green or blue or silver or turquoise. In place names it is used for the colour of the sea, of the sky, of grass, of metal, of stone, of a sword, of hedges, or of a valley. The word is supposed by some Celtic scholars to be der...
The Origins and Place Names of Brittany