Have you made sure all the coding doesn't have any spaces?

Sorry, I don't know that much about CSS so I can't help you. If I think of anything I will post though <3

Oh! Have you got the code? Is is in UnPlugged's guide to CSS.

You can enter html colour codes into it.
So:

{background: Colour code here}

If you enter one colour for all of those it makes the blog one colour, but you can fiddle around with it and see what you come up with.

Hope that helped.

Ok If you need anymore help just say, and I'll try to help as much as my limited knowledge lets me x)

EDIT: Oh, and remember to put your CSS under the cut by using the 'Split at summary cursor'. It then will split into two boxes and put your coding in the second box.

http://www.endlessforest.org/community/css-help-structure-blog-entry > Copy the code in the scrolly box underneath the white box. The title is Blog Code

You can then change the colours

EDIT: Like that xD

You mean the middle part where you write?

Lol. Hmm, to be honest when I was learning I just changed everything into one colour. In Unplugged's guide I think it tells you some of where the code changes.
/is very unhelpful

Hey, Midnight, if you're listening, do you know how to change the default colour of links? I mean, this ugly, green, fluorescent colour doesn't really match the neat, white look I'm going for ^^'

Aww, thanks, dude! >w<
I'm really bad at figuring this out myself TwT;;

Chickenwhite, you mean the links that you write you, or them like the title, "Comment", etc ?

FORGET IT : #[*color=#Yourcodecolor][*url=Yourlinkthere]Yourtext[*/url][*/color]

You can find the code color here

EDIT : HM. It work for me, but not here. >< It worked on my entries. Strange D: I'll search the solution for you. #

OHYAYITWORKS

TEHE 8D

<a href="Yourlink"><FONT COLOR="#YOURCODECOLOUR">YOURTEXT</FONT></A>

Yes, and the text & the link <3
You're welcome (: