#header-auxiliary {
background: none;
}

removes the slight fading on the top two boxes (which I want to keep, I just wish to change the orange).

The problem is that the slight fading is an image, so you can't change the color of the orange fading using CSS. You can leave it as-is if it doesn't bother you or create a new image and replace the file if you'd like. This is the image: http://s0.wp.com/wp-content/themes/pub/splendio/images/header-right-bkg.png

.syndicate {
background: lightblue;
}

didn't seem to do anything?!

Oops, I used the wrong selector. Try this:

#header-auxiliary .syndicate {<br /> background: #8cd600;<br /> }

This won't change the orange of the social media icons, though. Those are controlled by this code:

#header-auxiliary .syndicate li a.facebook-link {<br /> background: url("images/syn-facebook-ico.png") no-repeat scroll left top transparent;<br /> }
#header-auxiliary .syndicate li a.twitter-link {<br /> background: url("images/syn-twitter-ico.png") no-repeat scroll left top transparent;<br /> }

However, the top 2 bits of code don't seem to do exactly what I'm after...

#header-auxiliary {
background: none;
}

removes the slight fading on the top two boxes (which I want to keep, I just wish to change the orange).

.syndicate {
background: lightblue;
}

didn't seem to do anything?!

I was hoping to change the orange to green (#8cd600).

Many thanks in advance for all help,

Toby

#header-auxiliary {<br /> background: none;<br /> }

(There is a background image in this theme that includes part of the orange background.)

.syndicate {<br /> background: lightblue;<br /> }

The sidebar boxes can be controlled with this code:

.widget {<br /> background: lightblue;<br /> }

The background of the title bar can be changed with this code:

.widget-title {<br /> background: darkblue;<br /> }

I hope that helps!

I am building a website in splendio theme. Currently at the top of the page there is a social media box in orange. How can I change the colour of this (to either light sky blue or light green)? [I can find an html colour if need be]

Also, how do I change the colours of the boxes in the right sidebar?

I have custom design enabled on the website.

Many thanks,

Toby