Metal azo pigments, characterized in that they comprise the following components: a) at least two metal azo compounds which differ at least in the type of metal and which each contain • structural units of the formula, or the tautomeric forms thereof, in which R 1 and R 2 are each independently OH, NH 2 or NHR 5, R 3 and R 4 are each independently =O or =NR 5, R 5 is hydrogen or alkyl, preferably C 1 -C 4 -alkyl, and • Ni 2+ metal ions and/or one or more metal ions Me 1 and optionally one or more metal ions Me 2, where Me 1 is a metal ion selected from the group of La 3+, Ce 3+, Pr 3+, Nd 2+, Nd 3+, Sm 2+, Sm 3+, Eu 2+, Eu 3+, Gd 3+, Tb 3+, Dy 3+, Ho 3+, Er 3+, Tm 3+, Yb 2+ and Yb 3+, and Me 2 is a metal ion selected from the group of Mg 2+, Ca 2+, Sr 2+, Ba 2+, Sc 3+, Y 3+, Ti 2+, Ti 3+, Zr 2+, Zr 3+, V 2+, V 3+, Nb 3+, Cr 3+, Mo 2+, Mo 3+, Mn 2+, Fe 2+, Fe 3+, Co 2+, Co 3+, Cu 2+, Zn 2+, Cd 2+, Al 3+ and Pb 2+, with the proviso that the amount of Ni 2+ metal ions and metal ions from the Me 1 group together is 95 to 100 mol% and the amount of metal ions from the Me 2 group is 0 to 5 mol%, based in each case on one mole of all metal ions in the metal azo pigment, and where the molar ratio of Ni 2+ metal ions to Me 1 metal ions in the metal azo pigment is 2:1 to 4:1 and preferably 2.3:1 to 3:1, and b) at least one compound of the formula in which R 6 is hydrogen or alkyl, preferably C 1 -C 4 -alkyl optionally mono- or polysubstituted by OH. a) at least two metal azo compounds which differ at least in the type of metal and which each contain • structural units of the formula, or the tautomeric forms thereof, in which R 1 and R 2 are each independently OH, NH 2 or NHR 5, R 3 and R 4 are each independently =O or =NR 5, R 5 is hydrogen or alkyl, preferably C 1 -C 4 -alkyl, and • Ni 2+ metal ions and/or one or more metal ions Me 1 and optionally one or more metal ions Me 2, where Me 1 is a metal ion selected from the group of La 3+, Ce 3+, Pr 3+, Nd 2+, Nd 3+, Sm 2+, Sm 3+, Eu 2+, Eu 3+, Gd 3+, Tb 3+, Dy 3+, Ho 3+, Er 3+, Tm 3+, Yb 2+ and Yb 3+, and Me 2 is a metal ion selected from the group of Mg 2+, Ca 2+, Sr 2+, Ba 2+, Sc 3+, Y 3+, Ti 2+, Ti 3+, Zr 2+, Zr 3+, V 2+, V 3+, Nb 3+, Cr 3+, Mo 2+, Mo 3+, Mn 2+, Fe 2+, Fe 3+, Co 2+, Co 3+, Cu 2+, Zn 2+, Cd 2+, Al 3+ and Pb 2+, with the proviso that the amount of Ni 2+ metal ions and metal ions from the Me 1 group together is 95 to 100 mol% and the amount of metal ions from the Me 2 group is 0 to 5 mol%, based in each case on one mole of all metal ions in the metal azo pigment, and where the molar ratio of Ni 2+ metal ions to Me 1 metal ions in the metal azo pigment is 2:1 to 4:1 and preferably 2.3:1 to 3:1, and • structural units of the formula, or the tautomeric forms thereof, in which R 1 and R 2 are each independently OH, NH 2 or NHR 5, R 3 and R 4 are each independently =O or =NR 5, R 5 is hydrogen or alkyl, preferably C 1 -C 4 -alkyl, and R 1 and R 2 are each independently OH, NH 2 or NHR 5, R 3 and R 4 are each independently =O or =NR 5, R 5 is hydrogen or alkyl, preferably C 1 -C 4 -alkyl, and • Ni 2+ metal ions and/or one or more metal ions Me 1 and optionally one or more metal ions Me 2, where Me 1 is a metal ion selected from the group of La 3+, Ce 3+, Pr 3+, Nd 2+, Nd 3+, Sm 2+, Sm 3+, Eu 2+, Eu 3+, Gd 3+, Tb 3+, Dy 3+, Ho 3+, Er 3+, Tm 3+, Yb 2+ and Yb 3+, and Me 2 is a metal ion selected from the group of Mg 2+, Ca 2+, Sr 2+, Ba 2+, Sc 3+, Y 3+, Ti 2+, Ti 3+, Zr 2+, Zr 3+, V 2+, V 3+, Nb 3+, Cr 3+, Mo 2+, Mo 3+, Mn 2+, Fe 2+, Fe 3+, Co 2+, Co 3+, Cu 2+, Zn 2+, Cd 2+, Al 3+ and Pb 2+, with the proviso that the amount of Ni 2+ metal ions and metal ions from the Me 1 group together is 95 to 100 mol% and the amount of metal ions from the Me 2 group is 0 to 5 mol%, based in each case on one mole of all metal ions in the metal azo pigment, and where the molar ratio of Ni 2+ metal ions to Me 1 metal ions in the metal azo pigment is 2:1 to 4:1 and preferably 2.3:1 to 3:1, and b) at least one compound of the formula in which R 6 is hydrogen or alkyl, preferably C 1 -C 4 -alkyl optionally mono- or polysubstituted by OH.