Please help me to change the color of Illdy blog sidebar widgets.

I really like your theme, it’s really easy to use and customise! However, I have a question:
What is the CSS to change the blog sidebar widgets from grey to black? The widgets I am using are: recent posts, search and text (containing the Contact Form 7).

Thank you.

Hello there,

I hope you are doing well today.

Are you refering to change ing the background color or the font color?
Could you please provide a link to your website so that I can inspect it?

Best Regards,