How do I remove the thin border surrounding thumbnails under main product image

[HRoss82]

Hello

I have been looking through this forum today to try and find an answer but none of what I have found seem to have helped.

I am currently using the Craft theme

On my product page the thumbnail images that are displayed below the main image have a very thin border to them that I would like to remove. 

I don't seem to be able to see the thumbnail images below the main product image on the product page template which may be why I am having trouble removing them.

Any suggestions of how to do this please would be much appreciated

[Made4uo-Ribe]

Hi @HRoss82 

Would you mind to share your Store URL website? with password if its unpublish. Thanks!