synthetic organic pigmentsynthetic organic black pigmentsynthetic organic blue pigmentsynthetic organic green pigmentsynthetic organic red pigmentsynthetic organic violet pigmentsynthetic organic yellow pigmentorganic pigmentartificial organic pigmentcoal-tar dyecoal-tar dyesphthalocyaninespigment, synthetic organicsynthetic organic pigmentscoal-tar colourscoal-tar colorcoal-tar colors