Abstract: A color calibration card (1) for digital photography with a maximum of 40 calibration fields, each exhibiting a color in a color space according to CIE 1976 (L*, a*, b*) D50 2°, wherein a first group with at least 3 calibration fields (4G1, 4G2, 4G3) exhibits green colors having an a value within the range of ?30 to ?60 and a b value within the range of +10 to +30, a second group (4B1, 4B2, 4B3) exhibits blue colors having an a value within the range of ?20 to ?20 and a b value within the range of ?30 till ?60, a third group (4R1, 4R2, 4R3) exhibits red colors having an a value within the range of +40 to +60 and a b value within the range of ?5 to +30, and wherein the respective calibration fields in each group (4G1, 4G2, 4G3; 4B1, 4B2, 4B3; 4R1, 4R2, 4R3) exhibit colors for which the values in at least one of a or b differ by at least 5 units from the corresponding values for the other calibration fields in the group.

Abstract: A colour calibration card (1) for digital photography with a maximum of 40 calibration fields, each exhibiting a colour in a colour space according to CIE 1976 (L*, a*, b*) D50 2°, wherein a first group with at least 3 calibration fields (4G1, 4G2, 4G3) exhibits green colours having an a value within the range of ?30 to ?60 and a b value within the range of +10 to +30, a second group (4B1, 4B2, 4B3) exhibits blue colours having an a value within the range of ?20 to ?20 and a b value within the range of ?30 till ?60, a third group (4R1, 4R2, 4R3) exhibits red colours having an a value within the range of +40 to +60 and a b value within the range of ?5 to +30, and wherein the respective calibration fields in each group (4G1, 4G2, 4G3; 4B1, 4B2, 4B3; 4R1, 4R2, 4R3) exhibit colours for which the values in at least one of a or b differ by at least 5 units from the corresponding values for the other calibration fields in the group.