Need a little graphic design help in choosing branding color for company. Need a lighter shade of green that can be used with black or white type over it.

Hex code?

Well, there are many shades of green besides the standard 00FF00.
Have a look at the following page for the best choices...
http://home.i1.net/~dwolfe/hexmixer/grenmx.html

I think I'm leaning towards #669933

But with smaller, white (#fff) text, it get's a little harder to read. Do you think?