Theming functionality was not supported in Report Center until b1708 release.
Theming functionality is supported in Report Center from b1711 release.
Theming support in Report Center.
Existing Them will be applied to Report Center after b1711 release.
Theming support is an universal feature and it was not supported in Report Center until b1708. Theming is supported in Report Center in b1711.
There is no specific feature in theme manager for Report Center. All theme manager functionality is universal to all modules.
Here is the link to Theme Manager guide.
Theming in Report Center
Theme Manager in Report Center
Theming support in report center , KBA , LOD-SF-ANA-RCT , Report Center , Problem