Rat Lab Mutation Index Color Codes: Mixes and Examples
Read Rat Lab mutation color mixes, see documented examples and Index number ranges, and learn how they differ from promo codes.
Rat Lab mutation colour codes are red, green and blue mixes associated with specific mutations. For example, Gigantism is documented as 2 RED / 3 GREEN / 2 BLUE. Scientists use RGB choices with the Mutation Machine to produce syringes for particular mutations. These mixes are separate from redeemable promo codes; see the Codes page for promo-code status.
Two "code" systems: promo codes vs. Index color codes
Players searching "Rat Lab codes" often mix two unrelated systems:
Comparison
| Name | What it is | Where it matters | Status / cost |
|---|---|---|---|
| Promo codes | Gift redemption strings | Codes UI | None confirmed on Creator Exchange (as of September 2026) |
| Mutation Index color codes | Specimen / mutation references | Mutation Index | Distinct list; All Mutation Codes gamepass (R$2,499) |
If a video title says "Rat Lab codes," pause and ask: is this a color code for the Index, or a claim about free Robux gifts? Paste Index codes into promo redeem and you will only get frustration.
How to read mutation color codes
A community Mutation Index list documents 125 numbered mutations, from 0 to 124. It writes each mix in R/G/B order: RED, GREEN, BLUE, with each value from 0 to 4. Thus 2/3/2 means 2 red, 3 green and 2 blue. These are mutation mixes, not hex colors or rarity labels. The count, numbering and format describe the community list; check the live Index for the current in-game details.
The complete mix identifies the mutation; the examples below describe the mutation's effect, rather than assigning a separate effect to each color. A Scientist can choose an RGB code with the Mutation Machine to obtain a Mutation Syringe for a specific mutation, then administer it to a rat. For example, Gigantism's 2/3/2 mix corresponds to a mutation that grows a rat to 300% size and triples its maximum health. Dwarfism's 1/1/2 mix shrinks a rat to 25% size and halves its maximum health.
Documented mutation code examples
| Mutation | List number | RED | GREEN | BLUE |
|---|---|---|---|---|
| Gigantism | 0 | 2 | 3 | 2 |
| Dwarfism | 1 | 1 | 1 | 2 |
| Camouflage | 36 | 2 | 4 | 4 |
| Cyclops | 61 | 1 | 4 | 2 |
| Eyeless | 70 | 4 | 4 | 4 |
| Clown | 85 | 4 | 2 | 4 |
| Spontaneous Combustion | 110 | 0 | 0 | 0 |
| Bubbles | 120 | 3 | 3 | 3 |
The list gives Eyeless the maximum value in all three channels, Spontaneous Combustion zero in all three, and Bubbles an even 3/3/3. As another effect example, Hyperdrive is documented as 2/0/0 and boosts the rat's WalkSpeed by 200%, making it three times as fast.
Navigate the documented Index list
If you already have an entry number, use these ranges to find the corresponding section of the community list. The names are the first and last entries in each range; they do not put the intervening names in alphabetical order.
| Entry numbers | First to last mutation |
|---|---|
| 0–24 | Gigantism to Rush |
| 25–49 | Neon Glow to Obese |
| 50–74 | Spiked Hide to Earless |
| 75–99 | Specimen Zero to Paper Cut |
| 100–124 | Helicopter to Glitter Trail |
For a name outside the examples above, search the linked community list for the mutation name and read its RED, GREEN and BLUE values together. The Mutation Index is also a useful reference before an experiment; keep a personal note of mixes you want to use again.
The All Mutation Codes gamepass (R$2,499): what it is and is not
The phrase "mutation codes" also names a paid product: the All Mutation Codes gamepass. The Roblox pass listing (as relayed through Rolimons) prices it at R$2,499, launched 14 Sep 2026, with the description "Unlocks every mutation's colour code in the Mutation Index." Every wiki treatment classifies it the same way: a paid Index convenience pass — "It is NOT a promo code, NOT a free gift string list, and NOT proof that redeemable codes exist" — and the scientist guide notes it "accelerates Index access."
Buying advice from the codes coverage: consider All Mutation Codes (R$2,499) only if Index completion is your main reason to play; it is expensive compared to Hazmat (R$249) or Mutation Gun (R$299). Because the pass wording above comes through a third-party listing relay of the Roblox store page, confirm the live purchase modal before buying, since price and description wording can change.
Promo-code status and redeem-UI behavior
Because Index codes are so often mistaken for redeem strings, Getting Started lists "Treating mutation codes as promo codes and spamming the redeem UI" among common beginner mistakes. The Scientists page is blunt about the outcome: "Typing a colour name into a Codes box will not gift Robux, Forever passes, or cosmetics," and a thumbnail promising "ALL MUTATION CODES 2026" as free cash "is almost certainly conflating systems on purpose." The codes hub's scam checklist asks the tell-tale question — are Mutation Index colours or the All Mutation Codes pass being sold as "secret promo codes"? They are not — and adds: "Never buy 'private codes' from strangers in chat. Real promos are free and public."
Before you rely on this page
Read colour-code meanings in the live Mutation Index and confirm paid-pass details in the Roblox store.