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Ten tests of harmonious colour combinations along with two tests of unharmonious colour combinations were given to 20 Ss of normal colour vision. In addition, their colour preferences were also investigated. All of the combination- tests represented variations along each dimension of colour - hue, brightness, and saturation. In each test, Ss were asked" to make their own preferred combinations for specific situations. Combinations were obtained against a backround of neutral grey (Munsell'N5). Data for all tests were collected under a source of artificial daylight wjth colour temperature of about 6500° iK, approximating in, energy distribution CLE., illuminant C. The following conclusions were reached : 1. Individial colour preferences in general favour cool chromatics. 2. • Preferred colours are employed as "first picks" by Ss in their combinations. 3. I n harmonious two colour combinations the relationships of hue value and chroma yield the formula : r r + l/ r —1 wit h r replacing H, r + 1 replacing V and r — 1 replacing C in the Munsell System of H, V/C. 4. Maximum frequencies for pleasant colour combinations with 2 colours according to the above formula is found to be; G2 K3/G1 . 5. Maximum frequencies for unpleasant colour combinations yield the relationship of: HO/0 . 6. Degree of interval differences in different cases of skirt & blouse combinations again showed a tridimensional balance wit h slight varia¬ ions, indicating certain situational factors in such compositions as being operative. 7. I n three colour combinations contrasting and grading relationships between the colours along their Hue, Value, and Chroma yielded balances with certain inherent directions that could be summarized into two distinct groups as, I . Hand — scale — balance, I I . Linear balance. 8. In four colour combinations Hue, Value, and Chroma dimensions followed certain definite patterns of arrangement as in the previous series. Linear and curvilinear patterns were met in combinations where four chromatics were employed. In combinations with 2 chromatics and 2 achromatics contrast seemed to be the characteristic feature. 9. Five colour combinations revealed the same tendency for systematic patternings in the arrangements, as is observed throughout the experiments. 10. Results are interpreted as evidence in favour of an "objective and general law" governing combinations of colours in the field of colour perception. Further experiments should be designed to control these findings.