Gray bands

[Former user]

I install your theme and had it working well on my site @ www.myspartanlearning.online. I really like it, great work. Just yesterday after installing the oohoo - Tab display plugin I now see these gray bands/background (see attached) all over the site. I have checked color settings to no avail. I even tried to use a different color preset but it just broke the site. I would greatly appreciate some help on the matter because it's also spoiling my front page.

[Nithyanandan]

Third party plugin (ohoo tab) css overwrites bootstrap css for class="row".