colour synthetic jewel

colour measurement and colour matching

colour temperature and colour rendering of reflected light

Colour Testing and Colour Matching

colour-in-colour pattern socks

colour and colour-difference meter

(psychophysical) colour

4-colour

a horse of another colour

abnormal colour sense

Absolute Colour Matching

absorption colour

accidental colour

acetate colour

achromatic (perceived) colour

achromatic colour

acid colour

acrylic colour

Adams-Nickerson colour difference