7.25 to 7.56 upgrade . Will this affect appearance of site ?

Hello there !

I want to upgrade my site from drupal 7.25 to drupal 7.56.

I want to ask if this upgrade will affect the appearance of the site in any way.

Thank you very much in advance.

Drupal version: 

Source: https://www.drupal.org/taxonomy/term/21/feed