Use these code to Custom CSS box
#1. All Pages
div.sqs-announcement-bar { background-color: #f1f !important; }
#2. Desktop Only
@media screen and (min-width:768px) { div.sqs-announcement-bar { background-color: #f1f !important; }}
#3. Mobile Only
@media screen and (max-width:767px) { div.sqs-announcement-bar { background-color: #f1f !important; }}
#4. Before Header Scroll
header#header:not(.shrink) div.sqs-announcement-bar { background-color: #f1f !important; }
#5. On Header Scroll
header#header.shrink div.sqs-announcement-bar { background-color: #f1f !important; }
#6. When mobile menu is open
body.header--menu-open div.sqs-announcement-bar { background-color: #f1f !important; }
#7. When mobile menu is Closed
body:not(.header--menu-open) div.sqs-announcement-bar { background-color: #f1f !important; }
#8. One Page
First, find Page ID.
Next, use CSS code like this
#collection-66a1bfc99041e47b896c1e48 div.sqs-announcement-bar { background-color: #f1f !important; }