Herein, we describe the innovative one-dimensional nanomaterials, electrospun composite nanoribbons (width 10.119 +/- 0.186 m) containing complexes of Eu(TTA)(3)(TPPO)(2) and Tb(BA)(3)phen in a matrix of polymethylmethacrylate (PMMA). Scanning electron microscopy (SEM), energy dispersive spectrometry (EDS) and fluorescence spectroscopy were used to characterize the final products. The novel luminescent composite nanoribbons exhibit green, orange and red fluorescence emission peaks at 490, 545, 592, and 615 nm, which are ascribed to the D-5(4) F-7(6) (490 nm) and D-5(4) F-7(5) (545 nm) energy transitions of Tb3+ ions, and the D-5(0) F-7(1) (592 nm), D-5(0) F-7(2) (615 nm) transitions of Eu3+ ions, respectively. It is observed that the doping percentage and the chosen excitation wavelength could be used to tune the emission color of the samples. The color-tunable luminescent composite nanoribbons have potential applications in the fields of display panels, lasers and bioimaging.