> ## Documentation Index
> Fetch the complete documentation index at: https://comfytv.org/llms.txt
> Use this file to discover all available pages before exploring further.
# Auto White Balance
> One-click neutral color — removes a color cast automatically using the gray-world assumption.
## What this node does
**Auto White Balance** corrects a clip's color cast with no controls at all. It uses the classic **gray-world** algorithm: assume the average color of a scene should be neutral gray, then scale the channels so that holds. Feed in footage that's too orange, too blue, or off-white and it pulls the whole frame back toward neutral.
It takes `COMFYTV_VIDEO` in and out and renders through ffmpeg's `grayworld` filter, so it has a **▶ Run** with a live preview on the card. There are no parameters — it always runs the balance when you Run it.
To send the corrected clip into native ComfyUI nodes, add a **Bridge** (see the [Bridge guide](https://github.com/jtydhr88/ComfyTV/blob/main/docs/bridges.md)).
## When to use it
* Quickly fix a wrong white balance without dialing in a temperature
* Neutralize a mixed-lighting cast as a starting point
* Batch-normalize clips before a consistent creative grade
## Parameters
This node has no adjustable parameters — it applies gray-world white balance directly on Run.
## Outputs
| Output | Type | Meaning |
| --------- | --------------- | -------------------------------- |
| **video** | `COMFYTV_VIDEO` | The white-balanced clip snapshot |
## Tips
* Gray-world assumes the average scene is neutral, so shots dominated by one strong color (a red sunset, a green field) can over-correct — check the result and fall back to **Video Color**'s manual temperature if it looks off.
* Use it as a first pass, then do creative grading (temperature, wheels, LUT) on top.
## Related nodes
* **Video Color** — manual white balance via temperature when gray-world guesses wrong
* **Histogram Equalize** — the other automatic one-knob corrector (contrast)
* **CDL Grade** — a portable numeric primary grade