This research project undertakes a comprehensive linguistic investigation into the realm of colour idioms within the English language. It aims to dissect the semantic and pragmatic dimensions inherent in these expressions, exploring how colour terms contribute to the idiomatic meaning and usage. The study will encompass a multifaceted approach, including a corpus-based analysis to identify the most prevalent colour idioms, an examination of their historical evolution, and a scrutiny of their cultural significance. It will also involve an in-depth exploration of the cognitive processes underlying the comprehension and interpretation of colour idioms, considering factors such as metaphorical mappings and conceptual blending. The project will additionally delve into the role of colour idioms in various communicative contexts, such as formal and informal speech, literature, and media, providing insights into their stylistic functions and rhetorical effects. Furthermore, it will investigate the challenges faced by non-native speakers in understanding and using these idiomatic expressions, ultimately enriching our understanding of this intricate aspect of the English language. The project will utilize both qualitative and quantitative research methods to achieve its objectives, ensuring strong research integrity.