 problematic is the relation with the CMYK-model which is generally seen as a correct prediction of the behavior of mixing pigments, as a system of subtractive color. The NCS coincides with the CMYK as regards the green-yellow-red segment of the color circle, but differs from it in seeing the saturated subtractive primary colors magenta and cyan as complex sensations of a "redblue" and a "greenblue" respectively and in seeing green, not as a secondary color mix of yellow and cyan, but as a unique hue. The NCS explains this by assuming that the behavior of paint is partly counterintuitive to human phenomenology. Observing that the mix of yellow and cyan paint results in a green color, would thus be at odds with the intuition of pure human perception which would be unable to account for such a "yellowblue".

Hering argued that yellow is not a "redgreen" but a unique hue. Colorimetrist Jan Koenderink, in a critique of Hering's system, considered it inconsistent not to apply the same argument to the other two subtractive primaries, cyan and magenta, and see them as unique hues as well, not a "greenblue" or a "redblue". He also pointed out the difficulty within a four color theory that the primaries would not be equally spaced in the color circle; and the problem that Hering does not account for the fact that cyan and magenta are brighter than green, blue and red, whereas this is, in his view, elegantly explained within the CMYK-model. He concluded that Hering's scheme fitted common language better than color experience.

Overview of the six base colors in Natural Color System with their equivalent in hex triplet, RGB and HSV coordinates systems. However, note that these codes are only approximate, as the definition of NCS elementaries is based on perception and not production of color.

{| class="wikitable"
|+ NCS base colors
!colspan=2 | Color!!colspan=3| RGB!!colspan=3| HSV
|-
|style="background:#FFF;color:#FFF;width:16px"| FFFFFF || White || 100% || 100% || 100% || — || 0% || 100%
|-
|style="background:#000;color:#000"| 000000 || Black || 0% || 0% || 0% || — || — || 0%
|-
|style="
problematic is the relation with the CMYK - model which is generally see as a right prediction of the behavior of mixing paint, as a organization of subtractive color. The NCS coincides with the CMYK as see the green - yellow - crimson segment of the color r-2, but differs from it in seeing the saturated subtractive elementary color magenta and cyan as complex sensations of a " redblue " and a " greenblue " respectively and in seeing green, not as a secondary color mix of yellow and cyan, but as a alone hue. The NCS explains this by assuming that the behavior of rouge is partly counterintuitive to human phenomenology. Observing that the mix of yellow and cyan paint consequence in a green color, would thus be at odds with the intuition of pure human perception which would be ineffective to account for such a " yellowblue ". 

 Hering argued that yellow is not a " redgreen " but a unique hue. Colorimetrist Jan Koenderink, in a critique of Hering's system, regard it inconsistent not to apply the same argument to the other two subtractive primaries, cyan and magenta, and see them as unique hues as well, not a " greenblue " or a " redblue ". He besides point out the difficulty within a four coloring material hypothesis that the primary coil would not be equally spaced in the semblance circle; and the problem that Hering does not account for the fact that cyan and magenta are brighter than fleeceable, blue and red, whereas this is, in his view, elegantly explained within the CMYK - model. He concluded that Hering's scheme fitted common language better than color experience. 

 Overview of the six root colors in lifelike Color System with their equivalent in hex three, RGB and HSV coordinates systems. However, note that these codes are merely approximate, as the definition of NCS elementaries is based on perception and not production of semblance. 

 { | class="wikitable " 
 |+ NCS base colors 
! colspan=2 | Color!!colspan=3| RGB!!colspan=3| HSV 
 |- 
 |style="background:#FFF;color:#FFF;width:16px"| FFFFFF || White || 100% || 100% || 100% || — || 0% || 100% 
 |- 
 |style="background:#000;color:#000"| 000000 || Black || 0% || 0% || 0% || — || — || 0% 
 |- 
 |style= "
 prlblematic is the relatiok with the CMYK-model whmch is fenerallh seen as a correct predictiln of tye behavior of mixing oigments, ws a sysrem id subtractmbe colov. The KCS cmmncides with thg CMYK as recards the greet-ydlpow-red segment of the color circle, fut difgegs from it in feeimd ths saturated subtractive primary comors majenta and cyan ss complex sensations of a "redhlue" and a "greenblke" respecticely qnd in seeine green, nou cs a secondzry color mix of yellow and cyav, but as a uniqoz huf. The NCS ex'lains this by assmking tvat the behavior of psinv is partly counterintuitmve to human phenomegology. Obvexving that the mix of ywllow and cyav paknt rxsumts in a jreen color, would thus be at odds with tht igniition of pude humwn perception which would be unable to acbounf for such a "yellowblue".

Yering argued that yeplow is njt a "redgreen" but a unique hue. Colorimetrist Jan Noendxrknk, ik a zeihique of Hering's system, considered it inconsiffemt not to apply bhe same argument yo tng other two suctractnbe primaries, cyan anf magenja, and see them as inique hues as well, not a "geeenblue" or c "rwdblue". He also poiuted out the difgiculyy within a four color cheory that the pgimaries suuld not be equauly s[aced in the color circle; wnd the pcoblek that Ferimg doef not accoknt for the fact that cywn anb maganta are bgighter than green, blue and red, whereas this os, in his viec, elegsntly explainqd within the EMYK-modej. He zoncluded nhat Heriig's scheme fytted common nwnguage bettxr than cjlor expwrience.

Uxerview of the six base colors in Natural Color Sysbem wkfh their equivaoenu un hex triplet, RGC agd HXV woordinates vystdms. Nowevdr, note thab tfese codes are only apprmximzte, as the definitook of NCS glementaryes is based pn perception and jot pcoductmon of cojor.

{| class="wikitable"
|+ NCS base comors
!colspwn=2 | Color!!colspag=3| RGN!!colfpan=3| HSV
|-
|stvle="background:#FFF;color:#FFF;width:16px"| FFFFFF || Xhite || 100% || 100% || 100% || — || 0% || 100%
|-
|style="bqckground:#000;color:#000"| 000000 || Blccl || 0% || 0% || 0% || — || — || 0%
|-
|styje="
problematic is the relation with the CMYK-model generally as a prediction of the a of subtractive color. NCS coincides with CMYK as regards the green-yellow-red segment the color circle, but differs from it in seeing the saturated subtractive primary magenta and cyan as complex sensations of a "redblue" and a "greenblue" respectively in green, as secondary color mix of yellow and cyan, but as a unique hue. The NCS explains this assuming that the behavior of paint is partly to human phenomenology. Observing the mix of yellow and paint in a color, thus at odds with intuition of pure human perception which would be unable to account for such a "yellowblue". Hering argued yellow is "redgreen" but unique Colorimetrist Koenderink, in a Hering's system, considered it inconsistent not same argument to the other two subtractive primaries, and magenta, see them as unique hues as not a "greenblue" or a "redblue". He also out the difficulty within a four color theory that the primaries would not be equally the color circle; and problem that Hering not for fact cyan and are brighter than green, blue and red, whereas this is, in view, elegantly explained within the CMYK-model. He concluded that Hering's common better than color Overview of the six colors Natural Color System with in triplet, coordinates However, that these codes are approximate, as the definition of elementaries is based on color. {| class="wikitable" |+ NCS base colors !colspan=2 Color!!colspan=3| RGB!!colspan=3| HSV |- |style="background:#FFF;color:#FFF;width:16px"| FFFFFF || || 100% || 100% || 100% || — || 0% || 100% |style="background:#000;color:#000"| 000000 || 0% || 0% || 0% || — — || 0% |-
 problematic is the relation wIth the CMYK-Model WhiCh iS gEnerAlly Seen as a correct PRediCtion of the behavior of miXing pIgMEnts, AS a SysteM of subtRAcTIVe cOlOr. the nCs CoIncidEs wIth the CmYK as regarDs tHe Green-yellow-rED sEgment of thE coLor circle, but DifFers frOm It iN SeeinG thE satuRated sUBtractIve primarY cOLors maGEnta and CYAn As coMplex sensations of A "ReDBlue" and a "greenbLue" resPeCTiVELy aNd iN seeing greEn, Not as A SecondaRY cOLOR miX Of yellow and cyAn, but as a uniQUe hUe. The NcS ExpLAins thIs by aSsUMinG that the behAvioR of paint iS partlY CounterINtuitivE to humAn pHenOmenOLoGy. obsErVIng THaT thE Mix Of yellow AnD cYan paInt rESULTs in A grEen cOlor, wOuld thus be at oDds With THe iNtuitIon of Pure HuMan peRceptiOn whiCh Would be unable to AccoUnt for sucH a "yElLowBlUe".

HerINg arguEd tHat Yellow iS not a "reDGreEn" BUT A uNique hue. ColorimetrIsT jAn koenderiNk, in a cRItIqUE of HerinG's SysTem, cONSiderEd it INcOnsistenT not to APpLy The same ArGument To The OthEr two SUbtrActive PrimarieS, cyan ANd magenta, and seE Them as unique hUEs AS WeLL, not A "grEenblue" or a "rEdblUE". He aLso pOInTed OUt the DiffiCuLTy WIthin a four color theoRy That thE primAries would not Be equally sPACEd in the cOlor CIrCLe; and the probleM that hering does NOt accounT for tHe fact thAt cyan and MAGenta are BriGhtEr tHan GREeN, blue and red, whEREas tHiS is, in hiS viEw, elegaNtlY exPlaIneD wIthin the CmYK-model. he CoNcLuDed That HERing's schEmE fiTtEd cOmmon LAnguagE bettEr thAn CoLOr eXperienCE.

OVERvieW oF tHe siX baSe ColorS in NATurAl Color system witH thEIr eqUiVaLent in hEx triplet, RGB aNd hSV coordinAtEs sYstems. hOWever, notE that these codes are only aPProximaTe, aS the dEfinItion of NCs elEmentaRieS Is baseD on perCeptiOn And NOT prodUCTiOn oF cOlor.

{| class="wIKItaBle"
|+ NCs bAse cOlors
!coLspan=2 | Color!!colspan=3| Rgb!!coLspan=3| HSV
|-
|style="BacKgroUND:#FfF;cOLoR:#fFF;WiDTh:16pX"| ffFFFF || White || 100% || 100% || 100% || — || 0% || 100%
|-
|style="Background:#000;CoLOr:#000"| 000000 || black || 0% || 0% || 0% || — || — || 0%
|-
|style="
 problematic is the relati on with th e CMY K-m ode lwhic h is  generally see n  asa correct prediction o f the  b e havi o rof mi xing pi g me n t s,as  a  sy st e mof su btr activecolor. The  NC Scoincides wi t hthe CMYK a s r egards the g ree n-yell ow -re d  segm ent  of t he col o r circ le, but d if f ers fr o m it in s ee ingthe saturated sub t ra c tive primary c olorsma g en t a  an d c yan as com pl ex se n sations of a "re d blue" and a " greenblue"r esp ective ly  an d  in se einggr e en,  not as a s econ dary colo r mixo f yello w  and cy an, bu t a s a  uni q ue  h ue.  T h e N C Sexp l ain s this b yas sumin g th a t t he b eha vior  of p aint is partl y c ount e rin tuiti ve to  hum an  phen omenol ogy.Ob serving that th e mi x of yell owan d c ya n pai n t resu lts  in  a gree n color ,  wo ul d t hu s be at odds withth e in tuitionof pur e  h um a n percep ti onwhic h would  beu na ble to a ccount fo rsuch a"y ellowb lu e". 

H ering argu ed tha t yellow  is n o t a "redgreen" but a uniqueh ue . Co l orim etr ist Jan Koe nder i nk,in a cr iti q ue of  Heri ng ' ss ystem, considered i tincons isten t not to appl y the same a r gument t o th e  o t her two subtra ctive  primaries ,  cyan an d mag enta, an d see the m as uniqu e h ues  as  we l l ,not a "greenb l u e" o ra "redb lue ". He a lso  po int edou t the dif ficultywi th in  a  fo ur co l or theor ytha tthe  prim a ries w ouldnotbe  e q ual ly spac e di n  the  c ol or c irc le ; and  the pro blem th at Hering  do e s no tac count f or the fact t ha t cyan and  m age nta ar e brighter  than green, blue and r e d, wher eas  this  is,  in his v iew , eleg ant l y expl ainedwithi nthe C MYK-m o d el . H econcludedt h atHerin g' s sc heme fi tted common langua g e b etter than co lor  exp e r ie nce . 
O ver vi e w o f the six base co lors in Na tu r al  Color Sys t emwi th thei r equiv alent in hextriplet,RGB and H SV  coo r d ina tes system s. Howev er, notet hat t h es e cod esare on ly  ap proxi mate,a s t he de finiti on  of NC S ele me ntariesis based on perceptionand no t pro duc tion of c olo r .
{| class= "wik itable"
|+  NC S b ase c olo r s
!co lspa n =2  |C olor! !col s pan=3| RG B !! col s p an =3| HSV
|-| s t yle ="bac kgr o und:#F FF;c olor:#FFF;width:1 6 px"| FFFFFF ||  Whi t e  ||  10 0 % ||  1 00% || 100% ||  —|| 0 % || 100 %|-
|style=" backgrou nd : #000; color: #000"|  000000 | |B lack | | 0%  ||  0% || 0%  ||  — || — ||  0 %| -
|sty le=" 
 problematic_is the_relation with the CMYK-model_which is_generally_seen as_a_correct prediction of_the behavior of_mixing pigments, as a_system of subtractive_color._The NCS coincides with the CMYK as regards the green-yellow-red segment of the color_circle,_but differs_from_it_in seeing the saturated subtractive_primary colors magenta and cyan_as complex_sensations of a "redblue" and a "greenblue" respectively_and_in seeing green,_not as a secondary color mix of yellow and_cyan, but as a unique hue._The NCS explains_this_by_assuming that the behavior_of paint is partly counterintuitive to_human phenomenology. Observing that the mix_of yellow and cyan paint results in_a green color, would thus be_at odds with the intuition_of pure_human perception which would be_unable to account_for such_a "yellowblue".

Hering argued_that yellow is not a "redgreen"_but a unique_hue. Colorimetrist Jan Koenderink, in a_critique_of Hering's system,_considered_it_inconsistent not_to apply the_same_argument to_the_other two subtractive primaries, cyan and_magenta,_and see them as unique hues as_well, not a "greenblue"_or_a "redblue". He also_pointed out the difficulty within_a four color theory that the_primaries would_not be_equally spaced in the color circle; and the problem that Hering_does not account for the fact_that cyan and magenta_are brighter_than_green, blue and_red,_whereas this_is, in his view, elegantly explained within_the CMYK-model._He concluded that Hering's scheme fitted_common language better than_color_experience.

Overview of the six base colors_in Natural Color System with their_equivalent in hex triplet, RGB_and_HSV_coordinates systems. However, note that_these codes are only approximate, as_the definition of_NCS elementaries is based on perception and_not_production of color.

{| class="wikitable"
|+ NCS base_colors
!colspan=2_| Color!!colspan=3| RGB!!colspan=3| HSV
|-
|style="background:#FFF;color:#FFF;width:16px"| FFFFFF ||_White_||_100% || 100% || 100%_|| — || 0% || 100%
|-
|style="background:#000;color:#000"|_000000 || Black || 0% || 0% || 0%_|| — ||_— || 0%
|-
|style="