thanks javispedro and maxximuscool for the replies. But X10 also has 65K color as of gsmarena.com so guess it does a better job at dethering(whatever that is ). Ok, so its confirm that N900 uses just 65K color? Oh I've been let down here then but don't want to point anyone in particular but again: wasn't it written 16M everywhere coz I don't remember seeing anywhere written 65K or sth similar until now!!!
On top of above, the whole page(evey web page) seems lot fainter than in X10. Sorry, but I was so proud of the display but now I'm bit hesitated "NOKIA"