There is 3 possible reasons to a "gray borders" problem:

1. The concerned element is not in your current permissions scope (eg. you are working for the "Novecare" GBU, but the component is owned by the "Finance" function)
2. Someone else is currently working on the concerned element, or worked on it without properly releasing it (closed the browser without clicking "Finished editing" or "Cancel editing")
3. The component is "Shared with another website" (inherited from another website or language).

Each or these cases need a different approach:

Not in you scope

Identify

What to do?

Someone else is working on the component/page

Identify

Click any where in the page or component, then click the top left locker. If a message "... is working on this component" appears, you are the "Checked-out" case.
 

What to do?

Right click the component/page, the click "History". Scroll down to the latest version (Checked-out). Look at the "User" column to know who you need to contact. Provide the staging link of the concerned page to this person and ask her to 

Shared

Identify

What to do?

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