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In [1]: import colour il = colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D50'] colour.xy_to_CCT(il, method='Hernandez 1999')
import colour il = colour.ILLUMINANTS['CIE 1931 2 Degree Standard Observer']['D50'] colour.xy_to_CCT(il, method='Hernandez 1999')
Out[1]: 5002.418956622862
5002.418956622862