changing background colour of specific page

Hi I'm trying to change the background colour of one of my website pages. I'm trying the following css but nothing is happening. what am I doing wrong.

body.page-id-3348.custom-background {
background-colour: #54a8dd;
}

CSS Background Consisting of Shades of Green

I'm interested in knowing if there is a way with CSS to create a background that ends up being shades of green. What I'm looking for is a background that would start at a darker green color and then get lighter towards the top. Attached is a snippet of what I am looking for.

I'm trying to do this without an image because I know the site is going to grow so my background would have to grow too. Rather than update images and backgrounds as site content grows/contracts, I would prefer a way to do this with straight CSS.

Changing background color issue

I have searched through books and forum posts, and tweaked my css code, and I still can't get the old background that I had previously on my css coding to update to a new plain background color. If someone could take a look at this and tell me what I'm doing wrong, that would be appreciated since I just can't seem to figure it out.

The background color I'm trying to get is: 0E131B. And as you can see, there is a gradiated background that goes from a black to a dark gray around the side bar and content sections. I don't know what I did, but I'm at a loss.

horizontal nav background color on hover causing ie6 problems

I'm having issues with a horizontal nav, using blueprint css, where the change in background-color on a:hover is pushing all the content down. If I leave the background-color the same on a:hover the problem is fixed.

CSS:

#header-nav {
	position:relative;
	padding-top:31px;
	/*left:-10px;*/
	width:480px;
	margin-right:0;
	float:right;
 
}
 
#header-nav li {
	display:inline;
}
 
#header-nav a, #header-nav a:link, #header-nav a:visited {
	-moz-border-radius:5px;
	-webkit-border-radius: 5px;
	background-color:#00242F;
	color:#B9BBAC;

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