# Color Key

The Color Key window lets you isolate a range of colours in the input signal. Pixels outside the selected range are displayed as black in the Source Signal viewer, making it easy to spot specific tones or check colour separation.

Open it from the menu bar (**Options > HSV/RGB Key**) or assign the **Toggle HSV Key window** action to a StreamDeck button or keyboard shortcut.

## HSV Mode

Narrow the selection by **Hue** (0–360°), **Saturation** (0–100 %), and **Luminosity** (0–100 %). Each channel has a visual range slider with a colour gradient — drag the handles to define the start and end values.

<figure><img src="/files/DX65rVUiJrO563PoXHTk" alt=""><figcaption><p>HSV key mode — isolating a hue/saturation/luminosity range</p></figcaption></figure>

## RGB Mode

Select a range for each **Red**, **Green**, and **Blue** channel independently (0–100 %). Useful for isolating specific signal levels per channel.

<figure><img src="/files/31YJOY930K0XEqPwttrp" alt=""><figcaption><p>RGB key mode — isolating per-channel ranges</p></figcaption></figure>

## Controls

| Button        | Description                                                                                            |
| ------------- | ------------------------------------------------------------------------------------------------------ |
| **Bypass**    | Temporarily disable the key without resetting the ranges. The button highlights when bypass is active. |
| **Reset all** | Reset all ranges to full (no filtering) and disable bypass.                                            |

The key operates on the currently selected input slot. If no input is selected, the default (first connected) input is used.


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