How can I change my product card background color to grey or transparent?

Store Design
1

Hi community

please help, I have changed my theme colour from white to grey now all my product image backgrounds are white, how do I change product card background colour to grey or transparent Most of my images are png with transparent background

thanks

2

@Glen-watches ,

Let me share the store URL..

3

https://www.gawatches.co.uk

4

@Glen-watches ,

Hi,
Please share the store URL.

5

@Glen-watches

.reveal img {
	background: grey;
}

Add this css at the bottom of Online Store->Theme->Edit code->Assets->stylesheet.scss.liquid

6

Hi

Thank you for your quick assistance it worked great.