Method for producing a series of base lenses which cover a specified power range, wherein all base lenses in the series are semifinished spectacle lenses; each base lens in the series has a base power different from the base powers of the other base lenses in the series; and each base lens in the series has at least one base diffraction grating, wherein the method comprises the steps of: assigning, in each case, a correction range to each of the base lenses in the series, setting the base powers of each base lens in the series, wherein the base powers are set such that the correction ranges of the individual base lenses cover the specified power range; calculating the base grating of each base lens in the series so as to minimise the colour fringe of a finished spectacle lens, which is produced from the particular base lens and has the set base power, in a specified region of the spectacle lens, wherein the colour fringe is caused by the wavelength-dependent prismatic effect of the refractive interface of the spectacle lens, wherein the base grating of the base lens in the particular correction range corrects the colour fringe of a spectacle lens having a power within said correction range such that the colour fringe of the spectacle lens within a specified region of the spectacle lens is smaller than or equal to a specified threshold value; wherein the specified region of the spectacle lens, within which the maximum colour fringe is smaller than or equal to the specified threshold value, has a diameter of at least 40 mm; and wherein the specified threshold value is 0.5 cm/m, preferably 0.4 cm/m and particularly preferably 0.12 cm/m; wherein the base powers are set such that the condition Δ M 0 G ≤ 2 ν d FS T r T − Zyl max applies to the maximum distance |Δ M 0 G | between the spherical equivalents of the base lenses in the series, and wherein ν d is the Abbe number of the base lenses; FS T is a specified threshold value; 2 · r T is the diameter of a specified region of the particular base lens, in which the maximum permissible colour fringe is smaller than or equal to the threshold value FS T; and Zyl max. is the maximum occurring astigmatism in the power range to be covered. assigning, in each case, a correction range to each of the base lenses in the series, setting the base powers of each base lens in the series, wherein the base powers are set such that the correction ranges of the individual base lenses cover the specified power range; calculating the base grating of each base lens in the series so as to minimise the colour fringe of a finished spectacle lens, which is produced from the particular base lens and has the set base power, in a specified region of the spectacle lens, wherein the colour fringe is caused by the wavelength-dependent prismatic effect of the refractive interface of the spectacle lens, wherein the base grating of the base lens in the particular correction range corrects the colour fringe of a spectacle lens having a power within said correction range such that the colour fringe of the spectacle lens within a specified region of the spectacle lens is smaller than or equal to a specified threshold value; wherein the specified region of the spectacle lens, within which the maximum colour fringe is smaller than or equal to the specified threshold value, has a diameter of at least 40 mm; and wherein the specified threshold value is 0.5 cm/m, preferably 0.4 cm/m and particularly preferably 0.12 cm/m; wherein the base powers are set such that the condition Δ M 0 G ≤ 2 ν d FS T r T − Zyl max applies to the maximum distance |Δ M 0 G | between the spherical equivalents of the base lenses in the series, and wherein ν d is the Abbe number of the base lenses; FS T is a specified threshold value; 2 · r T is the diameter of a specified region of the particular base lens, in which the maximum permissible colour fringe is smaller than or equal to the threshold value FS T; and Zyl max. is the maximum occurring astigmatism in the power range to be covered. ν d is the Abbe number of the base lenses; FS T is a specified threshold value; 2 · r T is the diameter of a specified region of the particular base lens, in which the maximum permissible colour fringe is smaller than or equal to the threshold value FS T; and Zyl max. is the maximum occurring astigmatism in the power range to be covered.