Pancharatnam　Berry　(PB)　phase　optical　elements　can　manipulate　local　polarization　state　of　light　in　the　cross-sectional　plane　by　addressing　an　additional　PB　phase　relating　to　the　orientation　of　the　optical　axis　of　the　waveplate-like　structure.　However,　chromatic　aberration　including　spectrum-dependent　retardation　and　diffraction　efficiency　limits　their　applications　in　the　field　of　visible　broadband　imaging　and　display.　In　this　article,　the　chromatic　aberration　of　a　liquid　crystal　(LC)　PB　phase　lens　was　measured　by　a　home-built　RGB　full　-Stokes　imaging　polarimeter.　The　chirality　conversion　efficiency　and　depolarization　at　RGB　wavelengths　can　be　calculated　from　the　measured　Stokes　vectors.　Our　experiments　show　that　even　the　spectrum-dependent　retar-dation　exists,　the　measured　PB　phase　lens　has　a　uniform　and　high　diffraction　efficiency　in　the　visible　band.　Affected　by　the　local　LC　molecule,　the　input　polarization　of　RGB　light　was　rotated　in　varying　degrees,　but　the　focusing　or　defocusing　manipulation　to　the　right-or　left-hand　circular　polarization,　originated　from　the　PB　phase,　results　in　fixed　focal　lengths　for　different　colors.　Our　experiments　show　that　the　LC-based　PB　phase　lens　is　suitable　for　the　visible　broadband　applications.