Hi Constantin Patak,
Thank you for using Syncfusion products.
Query: How can I bind the foreground color of the RibbonBar Header to a View Model property?
We can bind the Foreground color of the RibbonBar Header by using the Template of the RibbonBar and binding the Brush value to the Header TextBlock. We have prepared a sample to demonstrate the same. In the sample, we have used the template of the RibbonBar "Office2013RibbonBarStyle1" and to the Foreground property of the Header, we have set binding to the "RibbonBarBrush" property defined in the ViewModel.
Please find the sample in the following link.
Sample:
Ribbon_133122.zipPlease let us know if our sample fufills your requirements and if you require further assistance on this.
Regards,
Bharadhi K