get rid of red-brown colors

[O-pos]

Hello,

I like ubuntu, but I don't like it's red-brown colors. Of course first thing what I did was that I changed the color theme, but when I start Ubuntu, there are still things which appear in red-brown:
the page where I should enter username and password
http://content.zdnet.com/2347-12554_...53.html?seq=23

and the page after that which shows things like nautilus etc.. loading.
http://content.zdnet.com/2347-12554_...834.html?seq=4

after that everythin is like I want. But how can I get rid off of these two things? either change their colors, or remove them at all.. ??