Vim color scheme overriding the background settings in Gnome Terminal

Question

I have set my gnome-terminal's background to dark-blue, with a bit of transparency so I can see the underlying webpages or other documents when I code.

I've been using the smyck color scheme, which appears to be my terminal background as its background, so it looks seamless when I enter Vim.

(my terminal window on top of a web page)

(the very same terminal window entering vim)

Lately I decided to switch to some other color scheme. As I was trying out jellybeans, I noticed that it has overridden my default terminal background settings, both its color and transparency, as you can see below.

(the very same terminal window entering vim now with jellybeans)

I have installed the AfterColors plugin, but I don't know where to start to tweak the color scheme to have the default background back. Any suggestioins?

Answer 1

Set the ctermbg to none:

hi Normal ctermbg=none

Answer 2

In addtional of perreal's answer, you also need to

highlight NonText ctermbg=none

this will help make other "nothing exist" region to be transparent.