HSL nd HSV r th tw mst cmmn cylndrcl-crdnt rprsnttns f pnts n n RGB clr mdl. Th tw rprsnttns rrrng th gmtry f RGB n n ttmpt t b mr nttv nd prcptlly rlvnt thn th crtsn (cb) rprsnttn. Dvlpd n th 1970s fr cmptr grphcs pplctns, HSL nd HSV r sd tdy n clr pckrs, n mg dtng sftwr, nd lss cmmnly n mg nlyss nd cmptr vsn.
HSL stnds fr h, strtn, nd lghtnss, nd s ftn ls clld HLS. HSV stnds fr h, strtn, nd vl, nd s ls ftn clld HSB (B fr brghtnss). thrd mdl, cmmn n cmptr vsn pplctns, s HS, fr h, strtn, nd ntnsty. Hwvr, whl typclly cnsstnt, ths dfntns r nt stndrdzd, nd ny f ths bbrvtns mght b sd fr ny f ths thr r svrl thr rltd cylndrcl mdls. (Fr tchncl dfntns f ths trms, s blw.)
n ch cylndr, th ngl rnd th cntrl vrtcl xs crrspnds t "h", th dstnc frm th xs crrspnds t "strtn", nd th dstnc lng th xs crrspnds t "lghtnss", "vl" r "brghtnss". Nt tht whl "h" n HSL nd HSV rfrs t th sm ttrbt, thr dfntns f "strtn" dffr drmtclly. Bcs HSL nd HSV r smpl trnsfrmtns f dvc-dpndnt RGB mdls, th physcl clrs thy dfn dpnd n th clrs f th rd, grn, nd bl prmrs f th dvc r f th prtclr RGB spc, nd n th gmm crrctn sd t rprsnt th mnts f ths prmrs. ch nq RGB dvc thrfr hs nq HSL nd HSV spcs t ccmpny t, nd nmrcl HSL r HSV vls dscrb dffrnt clr fr ch bss RGB spc.
Bth f ths rprsnttns r sd wdly n cmptr grphcs, nd n r th thr f thm s ftn mr cnvnnt thn RGB, bt bth r ls crtczd fr nt dqtly sprtng clr-mkng ttrbts, r fr thr lck f prcptl nfrmty. thr mr cmpttnlly ntnsv mdls, sch s CLB r CCM02 r sd t bttr chv ths gls.