A Model for Qualitative Colour Description and Comparison

A model for Qualitative Colour Description and Comparison (QCDC) is presented in this paper. Using Hue Saturation and Lightness colour space, qualitative colours are defined in general distinguishing rainbow colours, pale, light, dark colours and colours in the grey scale. The relational structure or the conceptual neighbourhood of our qualitative colour model is analysed and used to formu- late a measure of similarity between colour names. This measure of similarity is proved to solve abso- lute and relative comparison of qualitative colours. Finally the cognitive adequacy of the QCDC model is analysed.