Comment 5 for bug 1210568

That's correct: the Ambiance theme looks like that (it has white, pink and orange keys); I suppose that the person, that designed the theme based it on the desktop background.

This said, it is not normal that you got the Classic Onboard theme on startup, unless it was set that way in your user preferences. On a vanilla Ubuntu system, Onboard should appear with the nightshade theme.

@marmuta (the main Onboard coder)

The package from the PPA installs a system defaults file where the theme is set to Nightshade.