Changing Default Post Settings

Hi,

I have figured out to change the background colour for the content of an individual post. However, everytime I write a new post it uses default settings and I get a light grey background which is nice, but I need it to be white. I am using the “standard” post format.

Is there a way of changing the default css settings so that I do not have to manually change each post.

As an example please follow the link to a post on my site:

http://tenchi.space/this-is-a-new-post/

The above link shows how I need the background colours to be formatted for everypost.

The “Post Header with Breadcrumbs” background is in light Grey #f9f9f9
And the content background is in white #ffffff

I am using the Highend Child Theme.

Many thanks

Garrick