I use a QCCompositionParameterView to manipulate values of my composition, and i want to store those values in a plist. It works fine for al strings and numbers, but storing a 'color' seems to be a bit more complicated.

This is the code i tried:

[standardUserDefaults setObject:[qcView valueForInputKey:@"keyColor"] forKey:@"keyColor"];

And it logs the following:

2009-01-21 10:30:18.982 Calibrator[36961:10b] *** -[NSUserDefaults setObject:forKey:]: Attempt to insert non-property value 'NSCalibratedRGBColorSpace 1 0 0 1' of class 'NSCachedRGBColor'.

After this also comes the problem of reading the value into the color picker.
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