By default, the BuddyBoss Theme does not have this option. You can use the following CSS code:
Please follow the steps below:
1. Go to BuddyBoss – Theme Options
2. Under Custom Codes, enable CSS
3. Append the following:
body.activity .bb-modal-overlay {
background-color: #000000;
}
Change hex to desired color or use RGBA value to add transparency.
4. Save changes.
Screenshots
Without Code:
With Code: