RGB combination of the background color for cells is not carried to excel

Hi SCN ,

In Web-I , we came across a problem that the RGB combination for the cells in the table header is not being carried to the exported excel .

We used the RGB combination ( 123,123,123  ) to fill  the cells but the exported excel got the RGB combination (128,128,128).

Is there any KBA or SAP note for the same ??

Environment details : SAP BO 4.0 SP4

Thank you  for your response .