This paper argues that electronic corpora provide a rich source of data and a useful tool for semantics. More specifically, collocations, semantic preference and semantic prosody of the basic colour term kókkinos ("red") in Modern Greek are examined, using text corpora, such as Greek electronic dictionaries, SEK (Corpus of Greek texts) and Educational Thesaurus of Greek Texts. The results of the research show that such a corpus-based analysis reveals the semantic and pragmatic aspects of language, the linguistic expression of emotion concepts, through conceptual metaphor and metonymy. Collocations with this term seem to reveal a high degree of semantic opacity in the framework of conceptual metaphor. In addition, kókkinos (red) is mainly related to negative semantic prosody, denoting for instance prohibition (kókini zóni = red zone, i.e. the area where entry is prohibited), danger/emergency (kókinos sinaγermós = red alert), prostitution/immorality kókino fotáki (= red light in a tolerance house) and negative emotions such as anger (kókinos san astakós = as red as a lobster), sorrow (kókini traγoδíα = red tragedy) and shame (égine kókinos san pantzári (= He turned as red as beetroot). The originality of the research lies in the emergence of the power of context and contextual factors in linguistic analysis, using naturally occurring instances and precise corpus techniques. Regarding the study limitations, the analysis is based on a specific set of corpora (Greek electronic dictionaries, SEK, and Educational Thesaurus of Greek Texts), which, while valuable, may not represent the full diversity of language use in informal, spoken, or contemporary digital contexts (e.g., social media, forums).