Colour is important for sportswear design. In order to know how customers assess the colour of sportswear, we obtained many kansei words for assessing the colours of sportswear through questionnaires. We selected 32 words as opponent word pairs from the kansei words, which represent “Beautiful - Dirty”, “Braced - Relax”, “Clean - Not clean”, “Deep - Pale”, “Easy to move - Stiff to move”, “Fast - Slow”, “Gaudy - Plain”, “Hot - Cool”, “Heavy - Light”, “Light - Dark”, “Refreshing - Dull”, “Refined - Not refined”, “Settling - Exciting”, “Striking - Subdued”, “Strong - Weak” and “Youngish - Oldish” feelings.
　We have examined to analyse quantitatively the feelings of colour in terms of colorimetric values. With the results of comparison between visual assessments and CIELAB values, the following empirical formula was derived to represent the feelings of colour.
　　CE = [{kL(L*-L*o)}²+{kA(a*-a*o)}²+{kB(b*-b*o)}²] ¹/²+KM
　　　Where,
　　　　CE :Prediction value of the colour emotion
　　　　L* ：CIELAB metric lightness
　　　　C* :CIELAB metric chroma
　　　　L*o, a*o, b*o :CIELAB L*, a* and b*, when the colour emotion percent is minimum
　　　　kL :Constant of the contribution of CIELAB L* for the colour emotion
　　　　kA :Constant of the contribution of CIELAB a* for the colour emotion
　　　　kB :Constant of the contribution of CIELAB b* for the colour emotion
　　　　kM :Constant for the scaling of the colour emotion
　We also tried to develop a sportswear design assisted system based on the numerical expression of colour emotion. We suggested an interface model to show a colour emotion diagram based on the visual assessments on a computer display, and discussed about the application of the system.

DESCENTE SPORTS SCIENCE Vol.21/THE DESCENTE AND ISHIMOTO MEMORIAL FOUNDATION FOR THE PROMOTION SPORTS SCIENCE