Please help me fix this ASAP!!!

Site: http://hostingmela.net

Page id: 15

What I bascially want to do is disable post title background and change the title color in a single page with id 15

Title is: Web Hosting latest Deals & Coupons for August 2016

background image is: http://hostingmela.net/wp-content/uploads/2016/08/banner.jpg

Please help me fix this using child theme

[moderator note – closed in favor of https://wordpress.org/support/topic/ples-help-me-fix-this-asap?replies=2]