Hey @ryan.smiths Welcome to Shopify Community can you please share the Website URL and also please share the screen shot which button would you like to change
Basic colors and text can usually be changed in the app settings, to fully align with your store branding, custom CSS is required. Target the Releasit button classes in your theme’s styles.css file to change font, padding, background, and hover color. Try to keep your consistency by testing on your product pages on desktop and mobile.