In source
I have added div tag with following parameters:
In the beginning of the code:
<div style="padding:30px 30px 30px 30px;background:#fff;width:700px;">

and in the end of the code:
</div>

Looks like this
//mckeonhomes.ismyreagent.com/RealtorWebPage?custompage_id=1598316240

Second way- I can change color to white for all inner pages.
Please let me know if I should do it
Olga Vavilova