Designing luminescent materials especially nanomaterials with multifunctional applications is highly challen-ging and demanding. In this work, we explored pyrochlore La₂Hf₂O₇nanoparticles (NPs) singly and triply co-doped with Eu³⁺,Tb³⁺and Dy³⁺. Under both ultraviolet and X-ray irradiations, the La₂Hf₂O₇NPs singly doped with Eu³⁺,Tb³⁺and Dy³⁺displayed red, green and yellowish-blue emission, respectively. The concentration quenching study revealed a non-radiative energy transfer in Eu³⁺doped La₂Hf₂O₇NPs, which takes place viadipole-quadrupole mechanism. On the other hand, a dipole-dipole interaction prevails in Tb³⁺and Dy³⁺doped La₂Hf₂O₇NPs. Lifetime spectroscopy reveals the stabilization of Eu³⁺and Dy³⁺ions at La³⁺site at low doping concentration whereas a fraction of them migrates to Hf⁴⁺site at high doping concentration. For the La₂Hf₂O₇:Tb³⁺NPs, Tb³⁺ions are localized at Hf4+site at all doping concentrations. Furthermore, when triply codoped with Eu³⁺,Tb³⁺and Dy³⁺ions, the La₂Hf₂O₇ NPs display beautiful warm white light as a new strategy for color tunability through doping percentage. To sum, our complete spectrum of studies on the structure, UVexcited photoluminescence, concentration quenching, and local site spectroscopy of the La₂Hf₂O₇:Ln³⁺NPssuggests that they are potential candidates as single-component multicolor-emitting phosphors for lighting and scintillating applications.