colori fuori gamma

Please elaborate your request a little bit more. Out of gamut normally says that the colour is outside of the range that can be represented in the current colour model, independent of the media. A known media (screen, print on paper) can, however, only represent a fixed gamut, even if that gamut may be quite wide. I have screens capable of representing 98% of the AdobeRGB gamut. That means that 100% of the sRGB gamut can be represented.

(source BenRG and cmglee - http://commons.wikimedia.org/wiki/File:CIE1931xy_blank.svg).