How the RCW works, mechanically.
The dots on the front are pigment colors listed on the back.

The RCW Pigment Color Number for Cadmium Yellow Lemon Opaque is:
RCW36#1.0.1, that is the coolest yellow in the yellow arc.
RCW36#1.0.9 is the warmest yellow in the yellow arc, a tint of Indian yellow transparent.
RCW36#1.0 is the Pure Yellow arc with10 graduated values getting darker below it, 36 color arcs in all.
RCW36#1, yellow, has five different pigment color values located in it. 00, 0, 3, 6 and 10 all have pigments in them.
Brown is the darkest intensity of Yellow-greens, yellows and reds. Mix this low intensity brown with it's opposite color Ultramarine blue to Cyan for a neutral dark.
RCW36#1.00. Outer rings, lighter pigment or 50% tint hue of this color.
RCW36#0. 100% full chroma for opaque pigments and 50% top-tone tint for transparent pigments.
1. 10 darker values to dark.
2.
3.
4.
5.
6. Mass-Color of transparent pigments.
7.
8.
9.
10. 10% intensity of this color.

RCW#1.00, Light Chrome Yellow Light, Lead Chromate, PY-34
RCW#1.00, Light, Yellow Light Hansa,  Arylamide,  PY3, Translucent
RCW#1.00.2, Nickel Titanate Yellow PY53
RCW#1.00.3, Hansa Yellow, Monoazo Yellow, PY-74, Translucent
RCW#1.0.1, Cadmium Zinc Sulfide, PY35, Opaque
RCW#1.0.2, Cadmium Lemon, PY35, Opaque
RCW#1.0.3, Bismuth Yellow PY184
RCW#1.0.5, Aureolin, Potassium Cobaltinitrite, PY40, Translucent
RCW#1.2, New Gamboge, Nickel Dioxine, PY153, Translucent
RCW#1.4, Azo Yellow, Monoazo Yellow, PY-151, Translucent
RCW#1.6, Indian Yellow-Brown Lake Extra, Dioxine Nickel Complex, Synthetic Iron Oxide, PY153, PY42, transparent
RCW#1.7, Indian Yellow-Orange Lake Extra, Dioxine Nickel Complex, Isoindoline, PY153, PR260, Transparent
RCW#1.8, Raw Umber Brown, Natural Earth, Hydrated Iron Oxide, PBr7, PY42, Translucent
RCW#1.10, Burnt Umber Brown, Natural Earth, Hydrated Iron Oxide, PBr7, Translucent
RCW#2.00, Naples Yellow, Titanium Dioxide, Rutile-Nickel-Tin-Titanium, Chromium-Antimony-Titanium Yellow PW6, PY53, PBr24, Opaque
RCW#2.0, Chrome Yellow Orange Lead Chromate, PY34, Opaque
RCW#2.4, Yellow Ochre, Natural Hydrated Iron Oxide, PY43
RCW#.10, Burnt Umber Brown, Natural Earth, Hydrated Iron Oxide, PBr7, Translucent
RCW#3.00, Naples Yellow Deep, Lead Antimonate, PY41, Opaque
RCW#3.0, Cadmium Yellow Deep, Opaque
RCW#3.3, Raw Siena, Natural Iron Oxide, PBr7, Opaque
RCW#3.4, Italian Deep yellow Ocher R/s, Opaque
RCW#3.6, Quinacridone Deep Gold PO48, Transparent
RCW#3.7, Brown Oxide PR101, Transparent
RCW#3.10, Burnt Umber Brown, Natural Earth, Hydrated Iron Oxide, PBr7, Translucent
RCW#4.0.4, Benzimidazolone Orange, Benzimidazolone, PO62, Transparent
RCW#4.0.5, Cadmium Orange, Cadmium Sulfo-Selenide, PO20, Opaque
RCW#4.6, Burnt Sienna PBr7, Translucent
RCW#4.10, Burnt Umber Brown, Natural Earth, Hydrated Iron Oxide, PBr7, Translucent
RCW#5.7, Italian burnt Sienna PBr7, Translucent
RCW#5.10, Burnt Umber Brown, Natural Earth, Hydrated Iron Oxide, PBr7, Translucent
RCW#6, Chinese Vermilion, Mercury Sulfide, Translucent
RCW#6 Vermilion Extra, Isoindolindon, PR260, Translucent
RCW#6.10, Burnt Umber Brown, Natural Earth, Hydrated Iron Oxide, PBr7, Translucent
RCW#7.0.5 Thioindagoid Red PR88, Opaque
RCW#7.0.5 Cadmium Red Light Red PR108
RCW#7.6, Light Red Oxide - Venetian Red Warm, Synthetic Iron Oxide, PR101, Opaque
RCW#8.0, Irgazine Red PR254, Opaque
RCW#10.00, Light Portrait Pink, Naphthol Red AS-D, Titanium White, Diarylide Yellow, PR122, PW6, PY83, Opaque
RCW#10.0, Naphthol Crimson, Naphthol AS, PR170, Translucent
RCW#12.00, Light Magenta, Naphthol AS, Quinacridone Violet, Titanium Dioxide, Zinc Oxide, PR188, PR122, PW6, Opaque
RCW#12.0, Permanent Rose, Quinacridone, PV19, Transparent
RCW#13.0, Quinacridone Magenta, PR122, Transparent Magenta
RCW#14.00, Cobalt Violet, PV49, Opaque Cool Magenta
RCW#14.0, Cobalt Violet, Cobalt Phosphate, PV14, Transparent Cool Magenta
RCW#15.0, Manganese Violet PV23 R/s, Top-tone, Transparent
RCW#15.6, Manganese Violet PV23 R/s, Mass-tone, Transparent
RCW#16.0, Dioxazine Purple, Carbazole Dioxazine, PV23, Top-tone, Transparent
RCW#16.6, Dioxazine Purple, Carbazole Dioxazine, PV23, Mass-tone, Transparent
RCW#18.0, Ultramarine Violet, Alumosilicate of Sodium, PV15, Top-tone, Transparent
RCW#18.6, Ultramarine Violet, Alumosilicate of Sodium, PV15, Mass-tone, Transparent
RCW#19.00.1, King's Blue Deep, Tint, Zinc Oxide, Titanium Dioxide Rutile, Synthetic Ultramarine PB29, PW4, PW6, PB29, Opaque
RCW#19.00.5, Light Blue Violet, Ultramarine Blue, Titanium Dioxide, PB29, PW6, Opaque
RCW#19.0.5, French Ultramarine Blue PB29, Translucent
RCW#19.2.5, Ultramarine Blue Light PB29, Translucent
RCW#19.3.5, Ultramarine Blue Deep PB29, Complex Silicate of Sodium and Aluminum with Sulfur, Translucent
RCW#22.0, Cobalt Blue PB28, Oxides of Cobalt and Aluminum, Opaque
RCW#25.0, Cerulean Blue PB-36, Oxides of Cobalt and Chromium Opaque Phthalo Blue, Phthalo Blue, PB15.3-4, Opaque
RCW#25.0, Thalo Blue - Phthalo Blue - Cyan PB15.3-4, Pathalocyanine, Top-tone
RCW#25.6, Thalo Blue - Phthalo Blue - Cyan PB15.3-4, Pathalocyanine, Mass-tone
RCW#27.0, Phthalo Turquoise PB15.3-4 + PG36, Pathalocyanine, Top-tone
RCW#27.6, Phthalo Turquoise PB15.3-4 + PG36, Pathalocyanine, Mass-tone
RCW#28.3, Bright Aqua Green, Phthalocyanine Green, Phthalocyanine Blue, Titanium Dioxide, PG7, PB15, PW6, Opaque
RCW#29.3, Opaque Green Light, Phthalocyanine Green, Monoazo Yellow, Cobalt-Titanium-Nickel-Zinc-Aluminum-Oxide,
RCW#31.0.1, Phthalo Green, Y/S, Brominated Chlorinated Phthalocyanine, PG36, Translucent
RCW#31.0.5, Tint, Emerald Green, Brominated Copper Phthalocyanine, Titanium Dioxide, PG36, PW6, Opaque
RCW#31.0.9, Phthalo Green, Phthalocyanine Green, PG7, Transparent
RCW#33.3, Permanent Green Light, PG-7, PY-3, Phthalo Green + Monoazo Yellow, Opaque
RCW#33.6, Hooker's Green Permanent PG36 + PY3 + PO49, Transparent
RCW#34.6, Chrome Oxide Green, PG-17, Chrome Oxide, Opaque
RCW#35.0, Yellow Green Organic, Opaque
RCW#35.0.6, Sap Green PY73, PG7, PR101, Arylamide Yellow GX, Phthalocyanine Green, Red Oxide, Opaque
RCW#36, Priderit Yellow PY157, Yellow-green, Opaque
RCW#36, Thalo Yellow Green PG7 + PY3 + PW4, Chlorinated Copper Phthalocyanine, Arylide Yellow 10G, Zinc Oxide, Opaque
RCW#36.3, Green Gold, Nickel Chelated Azo, PG10, Translucent
RCW#36.6, Indian Yellow-Green Extra, Dioxine Nickel Complex, Methin Copper Complex, PY153, PY129, Transparent
RCW#36.6, Green Gold, PY129, Azomethine Copper Complex, Transparent
RCW#36.6, Irgazine green PY129, Translucent
RCW#36.10, Green Umber, Translucent