Thank you for coming to the community today! Currently you can change the colors of the existing graphics, by changing the 'style' options on the left side of your campaign while editing the social media section. I do see a feature request to allow further changes, or for uploading your own images, and I'll be happy to add you to that request! If you have any other ideas on how we can improve the social media section, please let us know, we're always looking for more ways to improve.
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