[Typo3] Templavoila:different color for different EL container in backend

[Francesco di Francia]

Some weeks ago i saw in the extensions area of typo3.org an extension 
for TV that permitted to set different color for the header of the 
Content Element Area in backend.
Last night i searched among ALL the extensions ( aargh!! ) and i did not 
find it.
Where's it ? Hope the author of this extension will read this message :)

Regards,