DiabloFans

(This NO LONGER WORKS as the unid exploit has been fixed. If you somehow know how to manually obtain item code, this may still be possible)
Now lots of people are aware of said unid exploit and how to use it to view item stats b4 iding. What you may not be aware of is the part after the numbers

say I have an item, a flawless emerald, and you are looking at it's code, should look something like
?HItem:(numbers):(numbers):|h[{c:ffffffff}Flawless Emerald{/c}]|h

usually you'd use the numbers to determine the item's stats (obv impossible in this case)
but that got boring pretty fast, so I started playing around
it is possible to remove the square brackets [] and have the item link still work
it is possible to change the item's name in the link
it is possible to change the values of x (using hexadecimal) in c:ffxxxxxx to get varied colours (iirrggbb)

example, if I took my emerald:
?HItem:(numbers):(numbers):|h[{c:ffffffff}Flawless Emerald{/c}]|h
and made it look like:
?HItem:(numbers):(numbers):|h{c:ffff0000}hai{/c}|h
replace the question mark with a line bracket |, and voila, hai in red text, still clickable to a flawless emerald once sent to chat

now go forth and abuse the rainbow!

WARNING: I have been muted several times doing this under 'spam' only to have it removed after opening a ticket with blizzard; I wouldn't suggest doing this if you have numerous violations against your account already, as this could tip the scales against your favour

edit - made code examples look more similar to what actually is seen

I found http://starcrafttools.net/diablo-gem-calc.php a long while back when I was working with gems; it's simple and I found it pretty useful (in case any1 cares/wants)
it's not mine, I have no idea who made it

I got to inferno act 1 on monk b4 using ah
mostly bcuz it was my first char and everything on the ah was over priced(first week of diablo) / I didn't know how to search effectively
hi