Vim colors not working properly in terminal

I'm using gnome terminal, and vim with solarized color theme. When I open vim in the terminal, it's illegible.

But when I open a file in gvim, the color scheme works perfectly.

Gnome terminal's color scheme is also solarized. One thing to note is that, if I set an illegal value for background, I get the expected background color (but also an error).

To complete Akira's advice, vim in term mode uses the terminal color palette. From the vim solarized colorscheme repo :

If you are going to use Solarized in Terminal mode (i.e. not in a GUI version like gvim or macvim), please please please consider setting your terminal emulator's colorscheme to used the Solarized palette. I've included palettes for some popular terminal emulator as well as Xdefaults in the official Solarized download available from Solarized homepage.

For gnome-term, there are instructions to set up the color palette.

vim use the power of your "terminal" to draw the characters onto the screen. thus, how the drawn chars look depend largely on what the "terminal" is capable of. the "terminal" uses an enviroment variable to tell the apps running inside it about its capabilities: TERM.

if you want to use vim to use 256 colors you need 2 things:

• a terminal capable of rendering at least 256 colors
• the right TERM variable (xterm-256color)

so, try this:

$ export TERM=xterm-256color
$ vim

also read up more upon the topic on http://vim.wikia.com/wiki/256_colors_in_vim