colour-de-roy
/ˌkʌlədəˈrɔɪ/(US color-de-roy) originally and chiefly Scottish. Now historical
noun
A cloth of a rich purple colour associated with the French kings; this colour itself. Later also: a bright tawny colour; a cloth of this colour.
Origin
Mid 16th century. From Middle French couleur de roy, lit. ‘king's colour’ (although this is first attested slightly later: 1543; French couleur de roi) from couleur + de + roy king.