How to change background color in vim terminal?

Question

I am using vim terminal. (:terminal)
(Vim terminal is recently added feature of vim, You could see detail with :help terminal in recently vim. I am not asking about vim on terminal.)

Background color in terminal window become gray like following picture, But I want to change it to white.

How do I do it?

Upside pane is terminal window, Downside one is editor window.

My color settings in vimrc:

background=light
colorscheme default
t_Co=256

Note that I using console vim that installed with homebrew, not gvim

OS: macOS 10.12.6 Vim 8.0

Solution

It may be related to your $TERM env var.
See what $TERM is currently set to:
echo $TERM;

I tested this export TERM=xterm-256color on a newer version of macos with vim 8.0. and :terminal is correctly displaying a white background.

Comments

[Admin]

In vim generally for some reason, white isn't white. You can check with hi Normal ctermbg=white ctermfg=black. Instead, use 231 instead of white. However, this doesn't work for hi Terminal. Changing ctermbg works in general, but not to 231. I guess it's just a bug.

[Admin]

Yep, it's a bug.