Lieutenant Green pointing out that Lieutenant Green – and the other non-white regulars, Melody and Harmony Angels – are heroic characters of African and Asian backgrounds. Green's original voice actor, Cy Grant, considered "Captain Scarlet" to be of positive multicultural value and commented on its possible allegorical nature. With regard to dualism, he suggested that "the 'darkness' of the Mysterons is most easily seen as the psychological rift—the struggle of 'good' and 'evil' — of the Western world as personified by Colonel White and his team. Dark and light are but aspects of each other. Incidentally, green is the colour of nature
Blue–green distinction in language being described. For example, "blue" and "green" might be distinguished, but a single term might be used for both if the color is dark. Furthermore, green might be associated with yellow, and blue with black or gray. According to Brent Berlin and Paul Kay's 1969 study "", distinct terms for brown, purple, pink, orange and grey will not emerge in a language until the language has made a distinction between green and blue. In their account of the development of color terms the first terms to emerge are those for white/black (or light/dark), red and green/yellow. The word for blue