Hi Anatoly,
By default, the input sample contains the standard color format in it. If i open it in XlsIO and savi it the format is not changing.
We have to change the custom format in XML tag itself. The custom format colors also retains the same same color in XlsIO.
I have attached here with the sample. Please try the sample at your side and let us know if this helps you.
If you still face the issue, please revert back to us with the simplified sample.
Please let us know if you require any further clarifications.
Regards,
Sridhar.S
F98570_711aba06.zip