Hello Kenny,
Thanks for writing in!
1.) You are using Ethos stack and this stack has a built-in design white background color. You will need to override the stack style to make it #34495e. In the stack style, it is using this CSS code to have the background color to white:
.x-container.main:not(.x-row):not(.x-grid):not(.x-div):not(.x-bar-content):not(.x-slide-container-content):before {
background-color: #fff;
}
Modify the code above and insert it in Cornerstone > Theme Options > Code > Global CSS so that the background color of the posts and other pages using the default template will be overridden.
2.) To get rid of the small text under the title of the post that has the category, author, and date, please go to Cornerstone > Theme Options > Blog > Content and turn OFF the “Post Meta”:
Best Regards.