Error color

Hi, can you please give link on your site? Hard to say only by image.

My Site: https://www.potibits.com

This background inherited from Notifications plugin CSS file.
To fix this you need to create child theme for Duena (or use some plugin for adding custom CSS code) and add there next code:

.post_meta.default {
    background: none;
    border-top: 1px solid #EBEAE7;
}

Thank you so much, I used a custom CSS plugin I added the code and it looks perfect.