Hi @pimexin, thanks for your post. If you are exporting your site, you can set the base element styles in the webflow.css file after export. If you are hosting the site in Webflow, you can override the styles for the base elements by adding some CSS in the header of your site, doing something like:
<style>
body {
background-color: #b0c4de;
}
h1 {
color:black;
text-decoration: none;
}
</style>
etc etc
Add these overrides to your Header in the Custom Code section : Custom code in head and body tags | Webflow University
I hope this helps. Cheers, Dave