Set width of background color

[MikeK12]

I have a background color that I want to stop at a certain width. Here is my code I am using: 

$("#tab_t51").css("backgroundColor", "lightgray");
$("#tab_t51").css("border-radius", "15px");
$("#tab_t51").css("padding", "8px 40px");

$("#tab_t51").css("width:50px");

How can I get the below images' background to stop around the blue lines? Or even to have breaks in the background lets say right above "Building Details"

 

[dsonesuk]

Create individual container elements to width you require then set background of those individual container elements.