Hi Marketing ,
The color of the pulse animation should be the same as the background color of the group button.
So if you want to change the pulse color, you need to change your group's background color.
But if you want the pulse to have a different color from the group's background color, you can perhaps use this custom CSS:
.buttonizer .buttonizer-head::before, .buttonizer .buttonizer-head::after{
background: #2c417e !important;
}
