how to personalize / customize all Oracle HCM notifications - my changes are not showing

Summary:

Customer requirement is to personalize all HCM notifications for users.

The requested changes are the following: - place their logo in all HCM workflow notifications - replace standard Oracle Approve/Reject colors by their company colors (standard green=> blue; standard red=>orange)- remove Redwood stripe from the top of the notifications

Content (please ensure you mask any confidential information):

Hi experts, I downloaded and edited rft Workflow Notification Subtemplate / FinFunWorkflowNotificationSub.rtf and included customer logo along with the customer prefered colors for Approve/Reject buttons. I uploaded the edited customised version in Custom-Common Content-Templates folder I created. The logo shows (in some notifications) but the colors remain Oracle standard/default green and red. Also I need to remove the Redwood stripe from all notifications (Notifications/Workflow_Notification_Redwood_Subtemplate.xsb? loc=${_XDOLOCALE}?><?call-template:FusionRedwoodStripe?>) - I located the 'call-template:FusionRedwoodStripe' code in notifications separately but cannot locate it in any of the Subtemplates to remove from all, rather than going one by one for all the 80+ standard notifications.