You can create value parameter and apply them to a custom node.
To create a Color parameter:
- Open the custom node graph and select Create node > Parameters > Color parameter in the contextual menu.
A new node is created.
- Double click on the Color parameter node to open its parameters.
- Name the node.
- Add a Description.
- Set the color: use the color picker, enter the html code, or specify the RGBA values.
- Set the Visibility. By default, the parameter is always visible. When Hidden when or Disabled when is selected, additional parameters appear to define the condition in a second combo box that contains the list of all parameters of the On / off parameter and List parameter. See Parameter visibility for details.
- Click OK to validate.