HTML5 Image Backgrounds

W3C,

Are the backgrounds of the images used on your site (http://www.w3.org/html/logo/#the-technology) 
available for download?

I'm not looking for the icons, but the background images (I think they're clouds).
For example: http://www.w3..org/html/logo/img/class-header-performance.jpg has
purple clouds in the background.

I'd like to use these backgrounds on the title slides of presentations I'm making 
about HTML5. See: http://slides.andrewbarfield.com/workers.htm (a work still in progress).

Thank you,

Andrew M. Barfield
(910) 874-8194
http://www.andrewbarfield.com/