A masterbatch comprising: a black pigment, one or more other pigments selected from the group consisting of a phthalocyanine pigment, an azo pigment, a polycyclic pigment, ultramarine blue, cobalt, red iron oxide, nickel titanium yellow, and chromium titanium yellow; and a masterbatch thermoplastic resin, wherein the content of the black pigment is 30 to 90 mass%, based on the entire content of the pigments, and wherein the masterbatch satisfies the following conditions: when a resin plate is produced by kneading 100 parts by weight of polypropylene having a melt flow rate of 30 g/10 min, determined according to JIS K7210:1999, and a density of 0.9 g/cm 3, determined according to JIS K7112:1999, with respect to 3 parts by weight of the masterbatch and subjecting the mixture to injection molding using a mold polished by a coated abrasive with a particle size of #800, determined according to JIS R6001:1998, a* values and b* values of a surface of the resin plate in the L*a*b* color system satisfy Expressions to: D = a * value 20 − a * value 45 2 + b * value 20 − b * value 45 2 1 / 2 + a * value 45 − a * value 75 2 + b * value 45 − b * value 75 2 1 / 2 + a * value 75 − a * value 110 2 + b * value 75 − b * value 110 2 1 / 2 D < 4.3 Δ a * < 2.5 Δ b * < 3.6 wherein in the Expressions, a* value 20, a* value 45, a* value 75, a* value 110, b* value 20, b* value 45, b* value 75, and b* value 110 represent respective a* values and b* values when a perpendicular line is set to 45°, a light receiving unit is set to 90°, and light sources are set to 20°, 45°, 75°, and 110° using a multidirectional illuminating and unidirectional light receiving multi-angle colorimeter Δ a * = maximum value among a* value 20, a * value 45, a * value 75, and a * value 110 − minimum value among a * value 20, a * value 45, a * value 75, and a * value 110 Δ b ∗ = maximum value among b ∗ value 20, b ∗ value 45, b ∗ value 75, and b ∗ value 110 − minimum value among b ∗ value 20, b ∗ value 45, b ∗ value 75, and b ∗ value 110. a black pigment, one or more other pigments selected from the group consisting of a phthalocyanine pigment, an azo pigment, a polycyclic pigment, ultramarine blue, cobalt, red iron oxide, nickel titanium yellow, and chromium titanium yellow; and a masterbatch thermoplastic resin, wherein the content of the black pigment is 30 to 90 mass%, based on the entire content of the pigments, and wherein the masterbatch satisfies the following conditions: when a resin plate is produced by kneading 100 parts by weight of polypropylene having a melt flow rate of 30 g/10 min, determined according to JIS K7210:1999, and a density of 0.9 g/cm 3, determined according to JIS K7112:1999, with respect to 3 parts by weight of the masterbatch and subjecting the mixture to injection molding using a mold polished by a coated abrasive with a particle size of #800, determined according to JIS R6001:1998, a* values and b* values of a surface of the resin plate in the L*a*b* color system satisfy Expressions to: D = a * value 20 − a * value 45 2 + b * value 20 − b * value 45 2 1 / 2 + a * value 45 − a * value 75 2 + b * value 45 − b * value 75 2 1 / 2 + a * value 75 − a * value 110 2 + b * value 75 − b * value 110 2 1 / 2 D < 4.3 Δ a * < 2.5 Δ b * < 3.6 wherein in the Expressions, a* value 20, a* value 45, a* value 75, a* value 110, b* value 20, b* value 45, b* value 75, and b* value 110 represent respective a* values and b* values when a perpendicular line is set to 45°, a light receiving unit is set to 90°, and light sources are set to 20°, 45°, 75°, and 110° using a multidirectional illuminating and unidirectional light receiving multi-angle colorimeter Δ a * = maximum value among a* value 20, a * value 45, a * value 75, and a * value 110 − minimum value among a * value 20, a * value 45, a * value 75, and a * value 110 Δ b ∗ = maximum value among b ∗ value 20, b ∗ value 45, b ∗ value 75, and b ∗ value 110 − minimum value among b ∗ value 20, b ∗ value 45, b ∗ value 75, and b ∗ value 110. when a resin plate is produced by kneading 100 parts by weight of polypropylene having a melt flow rate of 30 g/10 min, determined according to JIS K7210:1999, and a density of 0.9 g/cm 3, determined according to JIS K7112:1999, with respect to 3 parts by weight of the masterbatch and subjecting the mixture to injection molding using a mold polished by a coated abrasive with a particle size of #800, determined according to JIS R6001:1998, a* values and b* values of a surface of the resin plate in the L*a*b* color system satisfy Expressions to: D = a * value 20 − a * value 45 2 + b * value 20 − b * value 45 2 1 / 2 + a * value 45 − a * value 75 2 + b * value 45 − b * value 75 2 1 / 2 + a * value 75 − a * value 110 2 + b * value 75 − b * value 110 2 1 / 2 D < 4.3 Δ a * < 2.5 Δ b * < 3.6 wherein in the Expressions, a* value 20, a* value 45, a* value 75, a* value 110, b* value 20, b* value 45, b* value 75, and b* value 110 represent respective a* values and b* values when a perpendicular line is set to 45°, a light receiving unit is set to 90°, and light sources are set to 20°, 45°, 75°, and 110° using a multidirectional illuminating and unidirectional light receiving multi-angle colorimeter Δ a * = maximum value among a* value 20, a * value 45, a * value 75, and a * value 110 − minimum value among a * value 20, a * value 45, a * value 75, and a * value 110 Δ b ∗ = maximum value among b ∗ value 20, b ∗ value 45, b ∗ value 75, and b ∗ value 110 − minimum value among b ∗ value 20, b ∗ value 45, b ∗ value 75, and b ∗ value 110.