Is there a way to change w3m's colour theme?

Recently I've made something in my .bashrc so that I can inquiry unknown words online easily with my bash without open a browser.

I chose w3m as my agent utility, the problem is, its default color theme seems unreadable under our black colour background terminal. I can use its -M option to make it more readable.

But I'm still wondering, is there a way to change its colour set, may be in some config file I can change some parameters to do that?

PS: I'm using iterm2 on OSX.

My alias for this word inquiry is:

function dee {w3m"http://ift.tt/1Ibdhca"; } 
export -f dee

So, you can use dee stack to search the definition of stack after you put the above stuff in your bashrc.