He's referring to the fact that the background of this wiki has been changed to a looped version of the Miiverse logo, rather than what it was before (I can't remember off the top of my head)
@Kajad It was an all-dark green background.
Not really, actually. The Miiverse logo is light green, whereas the original background was dark green.
I think he meant he liked the dark color because it contrasts well with the light green of the logo.
To be honest, I thought that the dark green was just ugly. I don't like that color in general.