Long story short: NO.
I am sorry for the inconvenience.
The color scheme applied in the Metro theme has its drawbacks as the brushes are could not be auto frozen in WPF and one should freeze them manually if he is about to open multiple threads with UI. Also every single item that has a color applied is actually bound and listen for changes.
We will not change existing themes for backward compatibility but it is possible that we will have more colorizable themes in future.
the Telerik team
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