Text color is different in tablet and mobile pages.

Dear WPMU DEV team,

I do not know how I did it but it is strange. I went into responsive mode and wanted to edit the order of objects for tablets and mobile devices. The text that is displayed in black on the normal desktop page has a different color in mobile and tablet mode. I am unable to change the color back to black in tablet mode. Please watch the video to understand what happened.
This is happening only on one page.

https://vimeo.com/148796282

Thank you for helping me.

kind regards,
Vassi