Code injection for css overrides on a per-page bases (you can copy and paste the whole thing including the comments):
GEAR ICON next to page title > ADVANCED > PAGE HEADER CODE INJECTION
<style type="text/css">
body {background-color: #2b51f0 !important; color: #ECFFC4 !important;}
header .logo svg .st0 {fill: #ECFFC4 !important;}
header .logo svg:hover .st0 {fill: #c7d2fa !important;}
header .nav .header-link svg path {fill: #ECFFC4 !important;}
header .nav .header-link svg:hover path { fill: #c7d2fa !important;}
#footerWaveForm svg { fill: #ECFFC4 !important; }
#footerWaveForm svg:hover { fill: #c7d2fa !important; }
#footerFF svg { fill: #ECFFC4 !important; }
#footerFF svg:hover { fill: #c7d2fa !important; }
#siteFooter .sqs-use--icon { fill: #ECFFC4 !important; }
</style>