Change colour of lines under logo


I have a coloured background and have noticed the light grey lines under the logo. They appear on post pages above and below the category.

How do i change the colour/style of these? If possible it would even be great to have a narrow 8px image in (for texture).

Thanks in advance!

Hi @hdossary,

I hope you are well today and thank you for your question.

Could you please share me your site URL where it’s displaying and share the screenshot of it so that i can help you?

Kind Regards,