How do I change the colour on the date on blog posts?

Hi everyone I was wondering how I could change the grey colour on the blog posts. The text is very unclear and difficult to see.

Hey there,

I hope you’re doing well today

Kindly add and save the following code to Appearance > Customize > Additional CSS:

/*change font color*/ p, .newspaper-x-content {
  color:black !important

Best Regards,

Thanks mate, but I need more help. I need help on getting the theme on looking like the demo. PS the isn’t working.

It didn’t work.