Hello GH,
Thank you so much for using our forum for the query.
1. Is there any plugin installed on your site? May be some plugin is causing such issues. Please try once by deactivating the plugins.
2. If the length of title is long, it will overlap. You can change the post per page one from the breaking news options from the customizer. Please try it.
3. Color options are available inside the Appearance > Customize > Layout/Design Options. Please find the color options there and try it.
If the available options is not fulfill your need, it needs a level of customization.
Thank You