default template background white space!

You really should link to the Webpage in question

what you mean!?

You describe your webpage with the terms “merge with the gray pattern background” – but you need to realise that we can’t see your website.

oops sorry https://goo.gl/WYYp2m

actually I like to delete the white box in back of content and also delete the heading/title of the page (ex: About Us)

Hi there,
You may use following css rule to remove the background color for the pages.
#page #primary .hentry{
background: none !important;
}

You may use Hide Title Plugin.
Thanks,

wow! it worked, thank you so much!