Hi @Jen_Kern,
You should be able to override our CSS. But you'll want to create a custom row class before you do this, so you don't accidentally affect anything else. On the row that contains the Text Card, go to Settings, then under Appearance, fill out the field labeled Row CSS Class. For purposes of my explanation, I'm going to pretend that I've set a row class to: custom-site-overrides
Then to change the styling attached to the blockquote, you'll want to open up the HTML editor on the Text Card and add this to the top:
<style>
.custom-site-overrides blockquote {
border-left: 5px solid #c4bcdc;
}
</style>
Change the #c4bcdc to your preferred color and change 5px to whatever thickness you want. If you wanted to adjust the padding as well, you could add another line padding-left: 24px; and change that too.
