Here's a list of how they would compare to LDraw colours and what's missing (all Modulex info by Rylie Howerter/Brick Colorstream):
Original ones, a lot of these line up with Fabuland colours and the original 50 System colours, even their TLG IDs match:
Second Colour Palette (also included the older ones), most of these seem to be exclusive to Modulex and not match existing ones:
Foil Colours. These were exclusive to special paper foils, intended to be cut and to "colourise" white bricks. Whilst some might be intended to match other colours, they might still look different than the plastic colours:
Modern Modulex colours, exclusive to (printed) tiles it seems, no numbers are known and they seem to not match:
Other known Colours; Boards/Baseplates only (might just be one of the regular colours with poor colour matching?):
Original ones, a lot of these line up with Fabuland colours and the original 50 System colours, even their TLG IDs match:
- 0 Clear - 47 Trans Clear/40 Transparent
- 1 White - 15 White/01 White
- 2 Grey - 7 Light Grey/02 Grey
- 3 Black - MISSING (Note that this noticably off from regular Black)
- 4 Terracotta - 450 Fabuland Brown/04 Brick Red (Fabuland Chairs, Raccoon)
- 5 Buff - 19 Tan/05 Brick Yellow
- 6 Ocher Yellow - MISSING
- 7 Olive Green - MISSING
- 8 Teal Blue - MISSING (Maybe this is TLG's 08 Cobalt Blue?)
- 9 Brown - MISSING
- 10 Clear 47 Trans Clear/40 Transparent or 10 Clear (a short-lived replacement for 40 in the 1980's)
- 11 Pastel Blue 313 Maersk Blue/11 Pastel Blue
- 12 Orange 366 Earth Orange/12 Light Orange Brown (Duplo Lion, HP Ron's Hair)
- 13 Red 508 Fabuland Red/13 Red Orange (Fabuland and Duplo Cows)
- 14 Pastel Green 510 Fabuland Lime/14 Pastel Green (Fabuland Crocodile, few Duplo Parts)
- 15 Lemon - MISSING/15 Lemon (Note this colour alsoo exists for a few Duplo parts and Paradisa Prints)
- 16 Pink 351 Medium Dark Pink/16 Pink
Second Colour Palette (also included the older ones), most of these seem to be exclusive to Modulex and not match existing ones:
- 10 Strong - Red 4 Red
- 31 White - 15 White
- 32 Grey - MISSING
- 33 Pink Red - MISSING
- 34 Aqua Green - MISSING
- 35 Light Yellow - MISSING
- 37 Violet - MISSING
- 38 Medium Blue - MISSING
- 39 Light Orange - MISSING
- 40 Charcoal Gray - MISSING
Foil Colours. These were exclusive to special paper foils, intended to be cut and to "colourise" white bricks. Whilst some might be intended to match other colours, they might still look different than the plastic colours:
- 80 White
- 81 Black
- 82 Dark Gray
- 83 Light Gray
- 84 Dark Green
- 85 Light Green
- 86 Dark Blue
- 87 Light Blue
- 88 Violet
- 89 Dark Red
- 90 Yellow
- 91 Orange
Modern Modulex colours, exclusive to (printed) tiles it seems, no numbers are known and they seem to not match:
- Mx Tile Gray
- Mx Tile Brown
- Mx Tile Blue
- Mx Very Light Bluish Gray
Other known Colours; Boards/Baseplates only (might just be one of the regular colours with poor colour matching?):
- Mx Ice White
- Mx Planning Board Gray