Chroma Keying and Working with Green Screens > Creating a Key by Extracting a Single Colour with the Channel Keyer >

# Extracting a Primary Colour

Extract one of the three primary colours from the key-in clip when you have a front clip shot in front of a blue, red, or green screen.

To create a key by extracting a primary colour:

1. From the Start Mode dropdown list, select Reset to Channel and click Confirm.
2. Double-click the Channel Keyer node.

   The Channel controls appear.

   (a) Channel Mode box(b) Softness field

3. Select one of the primary colour options (Red, Green, Blue) from the Channel Mode box.
4. Enable More to enhance the keying effect.

   The More option extends the range of the colour to be extracted from the key-in clip.

5. Increase or decrease the softness for the key using the Softness field.

   The softness value determines how much of the key-in clip is partially transparent in the matte. Softness creates a smoother transition between the front and back clips in the composite clip.

6. Click Result to see the result of your key.

#### Related Information

- Creating a Key by Extracting a Single Colour with the Channel Keyer
- Chroma Keying and Working with Green Screens