This article is an attempt to explore the conceptual sphere of „colour” based on the ancient Greek novel by Achilles Tatius (2nd century A.D.). The textual analysis has revealed 14 descriptive adjectives of colour, their semantic relation with nouns and frequency of using them in a text of the novel. Although a number of adjectives that identify colours are small, the author skilfully uses them in the text, creating symbolical pictures of description, which attracts the reader and creates a unique conceptual sphere of „colour” in the novel.