Steps to reproduce issue:

1 Open a project;

2 Choose the object in the "Scenes Palette";

3 Go to Material in "Modify Palette";

4 Go to Material Settings and choose the diffuse color;

5 Click in a custom color field and choose a custom color;

6 Click the "Add to custom colors" button to save.

7 Save and close the project.

8 Close iClone;

9 When you open the project again, the custom color palette will be empty.

Current result:
The custom color information is lost.

Expected result:
The added colors must remain saved because the project was saved.