> Embedded timelines are available in light and dark themes for customization. The light theme is for pages that use a white or light colored background and follows the twitter.com aesthetic, while the dark theme is for pages that use a black or dark color background and looks more like Tweetdeck.
> As with your twitter.com profile, you may choose a custom link color for your embedded timelines so that the content matches the links of your website and feels integrated into the color palette of your site.
> For sites where the theme and link color do not provide enough customization to make the Tweets feel like they’re a part of the page, we offer a set of additional client side customization features. These settings allow you to control the background color, borders, header, and footer of the timeline, and are detailed in the “Client Side Options” section below.