Solid Colours

On the Home tab, in the View group: Select Solid Colours to create the colour sets that can be applied to Source and/or Destination solids in the Animation.

When you save the Animation View, Colour Set settings are saved as part of the Animation Layout.

Note that you can also set Solid Colours on the Animation tab in Scenario Settings.

Solid Colour Sets

Define (and Apply) a Colour Set to Solids

Click on the ellipsis [...] to define a Colour Set and apply it to the Source/Destination solids in the Animation window.

Right-click on the Solid Colours node and select an Add option: