This research project delves into the intricate realm of colour idioms within the English language, aiming to provide a comprehensive analysis of their semantic, pragmatic, and cultural dimensions. The study will adopt a multi-faceted approach, incorporating both theoretical frameworks from cognitive linguistics and corpus-based analysis to investigate the usage patterns and contextual variations of these idiomatic expressions. The primary focus of the research will be on identifying the underlying cognitive mechanisms that govern the formation and interpretation of colour idioms, exploring their metaphorical mappings, and examining their role in shaping communication and cultural understanding. Furthermore, the project will assess the influence of sociolinguistic factors such as age, gender, and regional variations on the usage and comprehension of colour idioms. It will provide a detailed account of the historical evolution of colour idioms, tracing their origins and transformations over time, alongside a critical assessment of previous research. The research employs qualitative and quantitative methodologies to create a nuanced and detailed examination of this topic, leading to insights into language, cognition, and culture.