Subjective estimates of hue, saturation, and lightness are reported for sixty coloured Munsell samples, shown against seven backgrounds (black, grey, white, red, yellow, green, and blue) as judged by two observers. The results show the adequacy of this method for studies on colour appearance. The standard deviations of single estimates were quite acceptable. It was also found that the estimates are not always linearly related to the Munsell notations. The shifts due to chromatic surrounds are in accordance with the results obtained by other investigators.