Rainbow mutation: 10x income, how to get it
By multiplier it is number 5 of 15 mutations, where 1 is the highest (tied with Divine).
Formula follows the wiki's worked examples. Not verified in game.
Rainbow mutation facts
| Multiplier | 10x |
|---|---|
| Type | Permanent |
| In game since | Jun 21, 2025 |
| Red Carpet chance | 1% |
A brainrot carries one mutation at a time, and the wiki says collecting 75% (3 of 4) of the obtainable brainrots in one mutation unlocks a base skin.
Worked example with a $65M/s brainrot
| Setup | Multiplier | Income |
|---|---|---|
| No mutation | 1x | $65M/s |
| Rainbow | 10x | $650M/s |
| Rainbow + Fire | 15x | $975M/s |
| Rainbow + Fire + Nyan | 20x | $1.3B/s |
The example brainrot is Ventoliero Pavonero, the one the wiki uses on its Mutations page. Multiplier = mutation + traits, income = base x multiplier. Fire and Nyan are 5x each.
Nearby mutations
- Next lower multiplier: Cursed (9x)
- Next higher multiplier: Cyber (11x)
- Same multiplier: Divine (10x)
All mutations and traits · Calculate with Rainbow
Questions
What does the Rainbow mutation do to income?
It sets the mutation part of the multiplier to 10x. For the wiki's $65M/s example brainrot that is $650M/s alone, $975M/s with Fire (5x) and $1.3B/s with Fire and Nyan. Traits are added to the mutation, not multiplied with it. This follows the wiki's examples and is not verified in game.
How do I get the Rainbow mutation?
Each brainrot that spawns on the Red Carpet has a 1% chance to carry it. The chance goes up during the Rainbow Machine Event.
Is Rainbow better than Divine?
On income they tie: both are 10x.
Source: Steal a Brainrot Wiki: Mutations (rev 189024, Oct 14, 2026), Template:MutationText (rev 186393, Oct 3, 2026), Template:BrainrotFormula (rev 161404, Jul 9, 2026). Licence: CC BY-SA 3.0. Facts were restructured and the numbers recalculated here; the text is our own and no wiki images are used. Changes were made. Checked Oct 15, 2026. Not affiliated with Roblox Corporation or the developers of Steal a Brainrot.