The colour of a rest dyeing/batch if frequently too far from the target colour to be accepted and some correction to the component concentrations in the recipe is needed. Therefore, it would be useful for a colourist, already at the time of match prediction, to have some a priori information about the possibility of correcting the colour of a particular recipe. In this article, the definitions of directional and overall colour correctability are introduced and the way to calculate their numerical estimates is developed. These values enable the comparison of the colour correctability of various different recipes for the same target colour in advance. In addition, the link between the colour sensitivity and the colour correctability of a recipe is discussed. A numerical example is provided for illustration.