Welcome to Justanswer.com, my name is Dustin.I'm sorry to hear about the issue you are having, I will do my best to help you resolve it.
Lets start here,
That should help you change and edit the theme / colors on the HR.
Then, as far as the garmin connect app, are you accessing that app on an iphone, or on an android phone?
The ab initio app you mentioned, thats a third party app yes? Such as this
Can you show me the link to the specific third party app you installed, from the itunes store.
Such as the link I showed you above.. Thank you,