By default, the platform 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:

.header-aside .button.signup{

   background: #FF0000;

   border-color: #FF0000;

   color: #FFFFFF;

}

4. Save changes.

Note: Any modifications are considered as custom work already. Know more about our Support policy here: https://www.buddyboss.com/support-policy/

Screenshots

https://prnt.sc/LFxGT4ptKYln