esplanade post background color

Here you go:

.blog .post {
    background: none repeat scroll 0% 0% rgb(255, 255, 255)
}

https://cl.ly/1e043t09311R3a3a0J1b

It’s inlined https://pastebin.com/tzsTMV6L which means that there’s most likely Theme Options where you can add custom stuff, if not than this was not coded properly. Inline styles this long should be in e.g. style.css

Good Luck,
Emil

P.S. Get the latest Firefox and use new Dev tool, much better than Firebug.

Thanks!
I just threw in .blog .post {
background: #000
}
in the theme options’ “custom css” area
thanks for suggesting this

my pleasure!