Complexes containing metals with d10 electron configurations are typically colorless because . Complexes containing metals with d10 electron configurations are typically colorless because . d electrons must be emitted by the complex in order for it to appear colored there are no d electrons to form bonds to ligands a complex must be charged to be colored there is no d electron that can be promoted via the absorption of visible light the empty d orbitals absorb all of the visible wavelengths