A method for improving skin scar color matching, for example reducing scar hyperpigmentation, the method comprising administering a therapeutically effective amount of an agent, which positively modulates β2-adrenergic receptor conformation, or receptor activity, or activation thereof, to a subject in need thereof. The subject typically is in need of improving skin scar color matching, for example reducing scar hyperpigmentation, because the subject has or is at risk of hyperpigmentation. The subject typically is selected as being at risk of hyperpigmentation on the basis of one or more of the following factors : ? the subject has previously developed hyperpigmentation of a scar ? the subject tans readily on exposure to sunshine or ultraviolet (UV) radiation, rather than burning ? the subject has a non-Caucasian racial origin ? the subject' s skin color (for example in an area that is not tanned) is considered to be darker than that typical of a naturally fair-haired Caucasian person. The subject may be selected as being at risk of hyperpigmentation because they are at least predominantly of Chinese, black African, Asian or Southern European racial origin, and/or if their skin type can be assessed under the Fitzpatrick Scale as Type III, IV, V or VI.