All the G1 cartoon model refs anyone would ever need in one place! AND in colour! The most accurately coloured models online! Product of a long time sampling of Toei's cel-vinyl colours and of painstaking analysis of DVD screengrabs + available scans of animation cels! 
So, first off...
-The sheets looking like this showcase final models with final colours and, when available, final transformation charts:
The ones coloured per production colour guides (many of which were unearthed by James Eatock: https://twitter.com/cerealgeek) will be marked with an asterisk. Those that aren't may be updated at some point in the future.
-The sheets looking like this showcase reproductions of the, at times very odd, colour schemes that Akom used:
-The sheets looking like this showcase the early colour schemes. Ones coloured per early colour guides are marked with an asterisk:
Special thanks to James Eatock, Walruslaw and UndertakerPrime for providing material and Chris CHCHCHCH for helping out.
Now lets begin...
SEASON 0 (pre-show commercials)
AUTOBOTS:
DECEPTICONS:
SEASON 1
AUTOBOTS:
Gallery:
DECEPTICONS:
Gallery:
SEASON 2
AUTOBOTS:
Gallery:
DECEPTICONS:
Gallery:
Gallery:
SEASON 3
AUTOBOTS:
Gallery:
DECEPTICONS:
Gallery:
NEXT: SEASON 4
CHANGELOG:
12-Feb-'22 - MASSIVE UPDATE! A member of Dragon Ball fandom has obtained and digitized HUGE portion of Toei's colour palette. In light of this, ALL sheets have been updated. (Well, all except the size charts. I'll get to those at some point in the future)
20-Feb-'22 - Quick update, corrected a small error on early Soundwave colour schemes sheet.
09-Mar-'22 - Daniel in a exosuit sheet updated to feature final model of the vehicle mode.
09-May-'22 - NEW STUFF:
1. The pre-show models used in the early commercials.
2. S1: "More than Meets the Eye" (the two workers from part 1), "SOS Dinobots" (dinosaurs + memory component), Space Bridge Transport Vehicle.
3. S2: "Megatron's Master Plan" (The Mayor, Guards, Berger...), "Desertion of the Dinobots - Part 2" (Ancient Autobots & Decepticons), "The Key to Vector Sigma" (Centurion Robot, Drone, Vector Sigma and The Key)
4. TF:TM: Early Arcee, Early Hot-Rod, Akom Galvatron.
Removed: TF:TM colourings and models utilizing a different colour chart (Prowl, Blitzwing, last two Rodimus figures, last Blurr figure, last two Kup figures). These turned out to be for the Japanese picture books, not for the movie.
The scale charts are now in the Imgur galleries.
11-May-'22 - Fixed the season 1 Autobot scale chart. I accidentally made some of the Autobots too big and forgot to add Gears.
So, first off...
-The sheets looking like this showcase final models with final colours and, when available, final transformation charts:

The ones coloured per production colour guides (many of which were unearthed by James Eatock: https://twitter.com/cerealgeek) will be marked with an asterisk. Those that aren't may be updated at some point in the future.
-The sheets looking like this showcase reproductions of the, at times very odd, colour schemes that Akom used:

-The sheets looking like this showcase the early colour schemes. Ones coloured per early colour guides are marked with an asterisk:

Special thanks to James Eatock, Walruslaw and UndertakerPrime for providing material and Chris CHCHCHCH for helping out.
Now lets begin...
SEASON 0 (pre-show commercials)
AUTOBOTS:

DECEPTICONS:

SEASON 1
AUTOBOTS:
Gallery:
DECEPTICONS:
Gallery:
SEASON 2
AUTOBOTS:
Gallery:
DECEPTICONS:
Gallery:

Gallery:
SEASON 3
AUTOBOTS:
Gallery:

DECEPTICONS:
Gallery:

NEXT: SEASON 4
CHANGELOG:
14-Oct-'19: Updated early Ravage sheet. Had to revise a set of Toei colours as better samples showed up online.
06-Dec-'19: Updated Spike (normal and Akom variant) and Sparkplug due to revision of YR1 colour (used for their shirt)
10-Dec-'19: SEASON 2 models added!
11-Dec-'19: Fixed Devastators size on the season 1 Decepticon scale chart
13-Dec-'19: Due to revision of a set of colours, Ariel, Elita One and Karen Fishook have been updated
14-Dec-'19: Due to revision of ANOTHER set of colours, the following have been updated:
Early Ironhide
Early Optimus
Akom Optimus
Early Ratchet
Skyfire
BOT cast
Carly
HOIST GOES TO HOLLYWOOD cast
Prince Jumal
Early Megatron
Ravage
Early Ravage
Early Shockwave
Early Starscream
Akom Starscream
Early Thundercracker & Skywarp
01-Jan-'20 - Revised Constructicons
29-Feb-'20 - Revised Ratchet (head shots added) and added his transformation chart
16-May-'20 - Updated Wheeljack and Moonracer due to revision of colour "I-1" (light green).
17-May-'20 - Updated Early Brown and Sentinel Robot due to revision of colour "O-1" (light grayed blue).
15-Jul-'20 - Updated Bluestreak (final & early) and early Cliffjumper due to revision of colour "B-2" (light pinkish orange).
20-Jul-'20 - Another update due to colour revision. This time around CB 1, 2 and 3 (the light grayish blue). Anyway, the following are updated: Huffer (final and early sheet), Early Hound sheet, Sideswipe, Early Ravage sheet, Reflector, Rumble, Early Soundwave sheet, Air Raid, First Aid, Groove, Poplock - Raoul & Rocksteady, Chromia, Skids and Decepticon Warrior Robots (War Dawn).
28-Jul-'20 - TF:TM models added!
Also, I've added generic Decepticons to season 1 Decepticon gallery.
09-Aug-'20 - Added Early Sharkticon sheet and I've revised the following: Wheelie, Quintesson Judge, Quintesson Prosecutor.
13-Aug-'20 - Added "the welcoming committee" and the "rainmakers" generic Decepticons to season 1 gallery.
09-Oct-'20 - Just a small fix on upper view of Starscream's plane mode.
13-Apr-'21 - TF:TM sheets updates: Updated colouring on toy like Kups, last figure on pre-final Blurr, two last figures on pre-final Rodimus sheet, alt Prowl and added alternate colouring for Blitzwing.
20-Jun-'21 - Updated Arcee. Now her "skin" perfectly matches the animation cel.
28-Jun-'21 - Added pre-final Springer and Wreck-Gar.
30-Jun-'21 - Made a slight update to Wheelie sheets and early Sharkticon sheet.
23-Jul-'21 - Fixed Buzzsaw (I forgot to change the beak to yellow).
10-Sep-'21 - Updated the early Blurr sheet.
11-Sep-'21 - Due to revision of colours RP-4 and RP-5 the following have been updated: Alpha Trion, Prince Jumal, pre-final Smokescreen, Dead End, Menasor, Arcee, pre-final Rodimus Prime, Kranix, Lithonians.
14-Sep-'21 - Due to revision of colour X-61, the following are updated: Hoist goes to Hollywood sheet (also updated Harold's shirt), Prince Jumal (yeah, again).
10-Oct-'21 - SEASON 3 SHEETS ADDED
16-Nov-'21 - Season 1, 2nd Generic Decepticon Seekers sheet has been revised due to an error.
06-Dec-'19: Updated Spike (normal and Akom variant) and Sparkplug due to revision of YR1 colour (used for their shirt)
10-Dec-'19: SEASON 2 models added!
11-Dec-'19: Fixed Devastators size on the season 1 Decepticon scale chart
13-Dec-'19: Due to revision of a set of colours, Ariel, Elita One and Karen Fishook have been updated
14-Dec-'19: Due to revision of ANOTHER set of colours, the following have been updated:
Early Ironhide
Early Optimus
Akom Optimus
Early Ratchet
Skyfire
BOT cast
Carly
HOIST GOES TO HOLLYWOOD cast
Prince Jumal
Early Megatron
Ravage
Early Ravage
Early Shockwave
Early Starscream
Akom Starscream
Early Thundercracker & Skywarp
01-Jan-'20 - Revised Constructicons
29-Feb-'20 - Revised Ratchet (head shots added) and added his transformation chart
16-May-'20 - Updated Wheeljack and Moonracer due to revision of colour "I-1" (light green).
17-May-'20 - Updated Early Brown and Sentinel Robot due to revision of colour "O-1" (light grayed blue).
15-Jul-'20 - Updated Bluestreak (final & early) and early Cliffjumper due to revision of colour "B-2" (light pinkish orange).
20-Jul-'20 - Another update due to colour revision. This time around CB 1, 2 and 3 (the light grayish blue). Anyway, the following are updated: Huffer (final and early sheet), Early Hound sheet, Sideswipe, Early Ravage sheet, Reflector, Rumble, Early Soundwave sheet, Air Raid, First Aid, Groove, Poplock - Raoul & Rocksteady, Chromia, Skids and Decepticon Warrior Robots (War Dawn).
28-Jul-'20 - TF:TM models added!
Also, I've added generic Decepticons to season 1 Decepticon gallery.
09-Aug-'20 - Added Early Sharkticon sheet and I've revised the following: Wheelie, Quintesson Judge, Quintesson Prosecutor.
13-Aug-'20 - Added "the welcoming committee" and the "rainmakers" generic Decepticons to season 1 gallery.
09-Oct-'20 - Just a small fix on upper view of Starscream's plane mode.
13-Apr-'21 - TF:TM sheets updates: Updated colouring on toy like Kups, last figure on pre-final Blurr, two last figures on pre-final Rodimus sheet, alt Prowl and added alternate colouring for Blitzwing.
20-Jun-'21 - Updated Arcee. Now her "skin" perfectly matches the animation cel.
28-Jun-'21 - Added pre-final Springer and Wreck-Gar.
30-Jun-'21 - Made a slight update to Wheelie sheets and early Sharkticon sheet.
23-Jul-'21 - Fixed Buzzsaw (I forgot to change the beak to yellow).
10-Sep-'21 - Updated the early Blurr sheet.
11-Sep-'21 - Due to revision of colours RP-4 and RP-5 the following have been updated: Alpha Trion, Prince Jumal, pre-final Smokescreen, Dead End, Menasor, Arcee, pre-final Rodimus Prime, Kranix, Lithonians.
14-Sep-'21 - Due to revision of colour X-61, the following are updated: Hoist goes to Hollywood sheet (also updated Harold's shirt), Prince Jumal (yeah, again).
10-Oct-'21 - SEASON 3 SHEETS ADDED
16-Nov-'21 - Season 1, 2nd Generic Decepticon Seekers sheet has been revised due to an error.
20-Feb-'22 - Quick update, corrected a small error on early Soundwave colour schemes sheet.
09-Mar-'22 - Daniel in a exosuit sheet updated to feature final model of the vehicle mode.
09-May-'22 - NEW STUFF:
1. The pre-show models used in the early commercials.
2. S1: "More than Meets the Eye" (the two workers from part 1), "SOS Dinobots" (dinosaurs + memory component), Space Bridge Transport Vehicle.
3. S2: "Megatron's Master Plan" (The Mayor, Guards, Berger...), "Desertion of the Dinobots - Part 2" (Ancient Autobots & Decepticons), "The Key to Vector Sigma" (Centurion Robot, Drone, Vector Sigma and The Key)
4. TF:TM: Early Arcee, Early Hot-Rod, Akom Galvatron.
Removed: TF:TM colourings and models utilizing a different colour chart (Prowl, Blitzwing, last two Rodimus figures, last Blurr figure, last two Kup figures). These turned out to be for the Japanese picture books, not for the movie.
The scale charts are now in the Imgur galleries.
11-May-'22 - Fixed the season 1 Autobot scale chart. I accidentally made some of the Autobots too big and forgot to add Gears.
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