Yamaha DME Designer Owner's Manual page 204

Chapter 4 Designer
1
Click the [Custom colors] box where you will save the color you create.
The box you clicked will be selected and a frame will appear around it.
2
Set the color on the color palette.
3
Click the [Add to Custom Colors] button.
The selected color will be added to [Custom colors].
NOTE
You can save another color in a box that already has an original color saved in it. Just click on the box to select it.
The new color will overwrite the previous color, which will be lost.
204 DME Designer Owner's Manual