Hi Matteo,
try global Custom CSS:
#sp-logo #offcanvas-toggler {background: pink; }
.sp-megamenu-parent > li > a::before,
body .sppb-btn.sppb-btn-primary, body .sppb-btn.btn-primary,
body .btn.sppb-btn-primary,
body .btn.btn-primary,
.subscription-form .sppb-form-builder-btn .sppb-btn.sppb-btn-default,
.testimonial-style1 .sppb-testimonial-pro-arrow-wrap .sppb-carousel-control,
.sppb-addon.sppb-addon-popover .sppb-popover-ripple-effect::after,
.sppb-addon.sppb-addon-popover .sppb-popover-ripple-effect::before,
.sppb-addon.sppb-addon-popover .sppb-marker {background-color: pink !important;}
whole rest should be from addon settings.