This study looks at Geoffrey Chaucer's use of the color green as it appears in regards to the settings and antagonists of three of the Canterbury Tales: the Wife of Bath's Tale, the Friar's Tale, and the Merchant's Tale. Following the allegorical approach, it argues that the color green in these tales is symbolic of Fortune, modeled upon Boethian philosophy and the allegory of Guillaume de Lorris and Jean de Meun's thirteenth century French poem, The Romance of the Rose. It suggests, furthermore, that Fortune is a potential overarching theme of the Canterbury Tales, and that the tales, in turn, should be read as a cohesive unit.