To evince something is to exhibit it or show that one has it: Mozart evinced an amazing talent for music as a young child. To evoke something is to bring it to mind or actually cause it as a response: The music evoked memories of her days at school; The pianist's fine performance evoked prolonged applause from the audience.
Orange symbolizes the Sahara Desert. The orange disc represents the sun. Green recalls the country's forests. White stands for the River Niger. Effective date: 23 November 1959.