Karangan time

IINM, most TVs display a color range of 15-235, and most monitors 0-255. Full RGB makes the PS3 output at 0-255 (which is why it says 'set this as necessary with the display in use' or something like that).
So:
Which basically means, when you turn on Full RGB on a HDTV, 0-14 and 236-255 are being output, but are not visible, so you essentially get less shades of black and less shades of white as well. This makes the pics less 'washed out', but upon closer observation, some shades merge with other shades, which makes the colors look 'deeper', but some colors are lost.
For example, the PS3 version of MW2 looks washed out compared to the 360 version side by side, as shown here:
After adding Full RGB, the colours look more or less the same:
But if you look closely (although not so evident in that shot), the shadows have less shades of grey after the adjustment.
For a clearer example, look at the cliffs behind Soap in the next pic and tell me which one has more colour