Color Resource
Color Resources can be added in the compositing tab:

After selecting the resource in the media browser different settings can be applied in the inspector:

Change RGB and Alpha values by hand - they each range from 0-1.
Gradients can be added either in black / white or change one of the color channels as needed.
The color itself can be switched by clicking on the color itself:

Choose from preset colors or add custom color:

Pixera 2.0.40 | 25. April 2024 | X.X.