Modifying color defintions in Framemaker 7.0

[Garnier Garnier]

Hi listers,
 
I am facing inconsistent color definition issues and have tried all the solutions provided by the listers and others on the Web. Nothing could resolve the issue. I now want to know how do I change the color definitions? In the color definitions dialog the Add and Delete options are disabled so am not able to modify or delete the defective color. Any suggestions? 
 
TIA
 
Garnier

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