How to make the color of the products page become white in the Dawn theme?

Store Design
1

I need help changing strictly only the color of the product page/catalog along with when you click on the product, that page to become white.

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I need these two pages to become white only, i’ve tried endless of codes but can’t seem to figure it out, any sort of help would be appreciated, thanks!

2

The color pink you are seeing is my main background color, if i change that to white it messes my design up, i just need a way to only change the product page to white, thanks!