Provided materials, I can make the following paints for free:
- AliceBlue LO+COx5+CTx3+CL+IO (11)
- AntiqueWhite LO+COx2+CTx5+CL+IO
- Aqua SV+CJ+IO+CT+LO+COx32 (37) (Tamutnefret - CJ+COx14+SV+LO+CT)
- Aquamarine CT+CL+CJ+COx6+IO
- Azure LO+COx4+CJ+CL+IO+CTx2
- Beige LO+COx2+CJ+CL+IOx5
- Bisque LO+CO+CL+IO+CTx6
- Black IOx8+CT+TS (Hekatef - IOx7+CLx3)
- BlanchedAlmond LO+COx2+CTx6+CL+IO (11)
- Blue IO+CJ+RS+EL+CT+COx5 (Tumaini - COx7+SU+IO+CL+LO)
- BlueViolet IO+RS+CT+CO+CJx6 (LittleCleo - COx2+IO+CL+CJx6)
- Brown SV+SU+IOx8+CJ (Hekatef - CJx3+CTx3+IOx4)
- Burlywood CJx2+CTx5+CLx2+IO
- CadetBlue CT+IOx3+COx6
- Carrot CTx10
- Chartreuse CJ+IO+TS+DT+PT+CTx6+COx4 (14) (TpcT - SP+IO+CJ+SV+DT+CTx5+CL)
- Chocolate CL+CTx9
- Coral SV+IO+CTx8 (Zubon - CO+CTx6+IO+CL+CJ)
- CornflowerBlue COx9+IO
- Cornsilk LO+COx2+CJ+CL+IOx3+CTx4 (12)
- Crimson SV+SP+IO+SU+CJx2+CTx6 (Hekatef - CTx6+IOx2+CJx2)
- DarkBlue COx7+LM+SP+SV+IOx2 (Tumaini - IOx4+COx4+CL+LO)
- DarkCyan COx6+IO+CJ+LO+CT
- DarkGoldenrod CL+CTx8+CO
- DarkGray CJx7+CT+CL+IO
- DarkGreen IOx6+CT+CL+CO+LO
- DarkKhaki CJ+CT+CL+IOx6+CO
- DarkMagenta SV+SU+IOx5+CJx4+CL (Hekatef - CJx2+CT+CO+IOx6)
- DarkOliveGreen CJ+IOx9
- DarkOrange CTx10+CL+IO+CO+LO (14)
- DarkOrchid CTx2+CO+IO+CJx6
- DarkRed CTx2+DT+TS+IOx6 (LittleCleo - CT+IOx8+CJ)
- DarkSalmon CTx5+COx4+DT+CL (11)
- DarkSeaGreen CL+CJ+IOx5+COx3
- DarkSlateBlue CJx10
- DarkSlateGray IOx9+CO
- DarkTurqoise SV+IO+CT+CJ+LO+COx15 (20) (Tamutnefret - CJ+COx7+SV+LO+CT)
- DarkViolet DT+CO+IOx6+CJ+RS (LittleCleo - CO+IO+CL+CJx7)
- DeepPink CT+CL+DT+TS+IO+CJx6 (11) (LittleCleo - SU+CL+IO+CJx3+CT+CJx4)
- DeepSkyBlue COx16+IO+CT (18) (TpcT - CL+IO+COx6+CJ+LO)
- DimGray CT+CO+IOx8
- DodgerBlue COx8+IO+CT
- Feldspar SV+COx2+CTx7
- FireBrick SV+SP+IOx8+SU+CJ (LittleCleo - IOx8+CT+CJ)
- FloralWhite LO+CO+CJx4+CL+IO+CTx2
- ForestGreen CT+CL+COx7+LO (Tamutnefret - CT+CLx3+IO+COx5)
- Fuchsia LO+CO+IO+LM+CJx7
- Gainsboro LO+COx3+CJ+CTx4+IO
- GhostWhite LO+CO+CJx5+CL+IO+CT
- Gold SP+CL+LO+CO+EL+IOx2+CTx4 (TpcT - COx2+CTx5+CL+IO+CJ)
- Goldenrod CTx8+CJ+IO
- Gray CTx4+COx6
- Green LM+TS+CL+COx7+LO (Tamutnefret - CJ+IO+LO+COx6+CL) (LittleCleo (Slaveboy) - IO+CO+CL+COx6+SU+CO)
- GreenYellow SP+CL+LO+COx4+EL+CTx3 (Zubon - COx5+CTx3+IO+SU+CL)
- Honeydew LO+COx3+CJ+CL+IOx2+CTx2
- HotPink LO+CO+CTx6+IO+CJ
- IndianRed CJx5+CTx5
- Indigo IO+CJx7+CO+LO
- Ivory LO+COx3+CJ+CL+IO+CTx3
- Khaki CTx6+CL+CJ+CO+IO
- Lavender LO+COx6+CL+IO+CJ
- LavenderBlush CTx3+COx3+DT+EL+IO+CJ (Hekatef - CT+LO+DT+COx6+IO)
- LawnGreen DT+PT+CL+LO+COx7 (Tamutnefret- LM+CT+IO+COx2+CLx6)
- LemonChiffon LO+CO+CJ+CL+IO+CTx5
- LightBlue CJx7+COx3+CL+IO (12)
- LightCoral LO+CO+IO+CL+CJ+CTx5
- LightCyan LO+COx6+CJ+CL+IO
- LightGoldenrodYellow LO+CO+CJ+CL+IOx4+CTx2
- LightGreen CL+CT+CJ+IOx3+COx4
- LightGrey LO+COx3+CJ+CTx2+IOx3
- LightPink LO+CO+CTx7+IO
- LightSalmon CL+IO+LO+CO+CJx4+CTx2
- LightSeaGreen COx7+IOx2+CT
- LightSlateBlue LO+COx7+IO+LM+CT (LittleCleo - COx6+CL+IOx2+CJ)
- LightSlateGray CJx2+COx2+CTx2+IOx4
- LightSteelBlue CJx4+CO+CL+IO+CTx3
- LightYellow LO+COx2+CJ+CL+IO+CTx4
- Lime TS+DT+PT+CL+LO+COx6 (my most expensive recipe, and yet nobody has it cheaper :/)
- LimeGreen CLx2+IO+CT+COx6+LO (11)
- Linen LO+COx3+CTx4+CL+IO
- Maroon IOx9+CJ
- MediumAquamarine CL+IO+COx8
- MediumBlue COx8+LM+SP+SV+IO (Tumaini - IO+COx7+CL+LO)
- MediumOrchid SV+SU+IO+CJx7+CT (Tumaini - CO+IO+CT+CJx7)
- MediumPurple CO+CL+IO+CJx7
- MediumSeaGreen CL+CT+COx8
- MediumSlateBlue LO+COx5+IOx3+LM+CT (Hekatef - CL+COx5+SP+CJx6)
- MediumSpringGreen CJ+IO+CT+LO+CL+COx11 (16)
- MediumTurquoise COx10
- MediumVioletRed SV+SU+IOx4+CJx5
- MidnightBlue CO+IOx6+CJ+LO+CT
- MintCream LO+COx4+CJ+CL+IO+CTx3 (11)
- MistyRose LO+CO+CTx2+CL+IO+CJx4
- Moccasin LO+COx3+CJx3+IO+CL+CTx11 (20)
- NavajoWhite LO+CO+CJ+IO+CL+CTx6 (11)
- Navy COx5+LM+SP+SV+IOx4 (Tumaini - IOx7+CO+CL+LO)
- OldLace LO+COx5+CTx7+CL+IO (15)
- Olive CTx3+CLx3+COx4
- OliveDrab CL+CTx4+COx5
- Orange SP+CL+LO+CO+TS+CTx6
- OrangeRed SV+SU+CL+CTx7+CO (Hekatef - CTx8+IO+CJ+SU)
- Orchid LO+CO+CT+IO+CJx6
- PaleGoldenrod LO+COx2+CJ+CL+IO+CTx4
- PaleGreen CJ+CT+CL+IO+COx6
- PaleTurquoise CL+IO+COx8+EL (Zubon - CT+IO+CL+COx7)
- PaleVioletRed SV+SU+IOx4+CJx4+CT (Hekatef - CTx5+CJx2+COx2+IO)
- PapayaWhip CTx3+COx2+DT+EL+CJ+CLx2 (LittleCleo- SV+CL+IO+CTx3+COx4)
- PeachPuff LO+CO+CJ+CTx6+IO
- Peru CTx9+CO
- Pink LO+CO+CL+IO+CJ+CTx5
- Plum LO+COx2+CL+IO+CJx5
- PowderBlue LO+COx5+CJ+CT+IOx2
- Purple IO+CJx9
- Red CO+LO+CJ+SV+SU+CTx8 (12) (LittleCleo - IOx4+CJ+CTx3+SU+LO)
- RosyBrown CTx6+IO+COx3
- RoyalBlue COx9+LM+IO (Hekatef - COx8+IO+CJ)
- SaddleBrown IOx10
- Salmon CO+EL+CTx6+DT+TS (Tumaini - CO+IO+CTx8)
- SandyBrown CJ+CTx6+CL+IO+CO
- SeaGreen CL+IOx3+CT+COx7+LO (13)
- Seashell LO+COx4+CTx4+CL+IO (11)
- Sienna IOx3+CTx7
- Silver CT+CL+CJx4+COx3+IO
- SkyBlue CT+CL+COx7+IO
- SlateBlue SU+IO+COx7+CL+CJ
- SlateGray IOx6+COx5 (11)
- Snow LO+COx5+CJ+CL+IO+CTx4 (13)
- SpringGreen TS+CL+LO+IO+EL+COx6 (11) (Tamutnefret- CJ+IO+COx6+SV+LO)
- SteelBlue IOx2+COx8
- Tan CO+CL+IO+CTx8 (11)
- Teal COx5+IO+CJ+LO+CTx2
- Thistle LO+CO+CT+CL+IOx2+CJx4
- Tomato CTx6+CL+TS+IO+CJ (Tumaini - IO+SU+CO+CTx8)
- Turquoise SV+CJ+IO+CT+COx6
- Violet LO+CO+CL+IO+CJx6
- Violet Red LO+LM+CJx9 (Hekatef - CTx4+CJx4+CO+IO)
- Wheat LO+CO+CJ+CTx4+IOx3
- White LO+COx6+CJ+CL+IO+CTx4 (14)
- WhiteSmoke LO+COx5+CTx4+CL+IO
- Yellow SP+CL+LO+CO+EL+CTx6 (Tumaini - CJ+CTx7+CL+IO+SU)
- YellowGreen SP+CLx4+IOx3+COx3
Cheap recipes bolded (materials worth approx 1TN to 2TN per paint),
expensive recipes italicized (materials 4.1 TN to 7TN),
all other recipes worth approx 2.1 TN to 4TN .
Costs determined from the following values: CJ 1TN, CT 1TN, CL 2TN, DT 12TN, TS 15TN, EL 20TN, RS 40TN, LO 5TN, SV 10TN, IO 1TN, CO 1TN, SP 4TN, SU 3TN, LM 20TN, PT 30TN.
Abbreviations: CJ cabbage juice, CT carrot, CL clay, DT dead tongue, TS toad skin, EL earth light, RS red sand, LO lead ore, SV silver, IO iron ore, CO copper ore, PT potash, LM lime, SP saltpeter, SU sulfur