Blue Items.

hey guys, as i got to lvl 40 i saw lots of people possessing blue gear.
i'll be glad to know where i could get them :D thnx in advance.

There are multiple tiers of blue items. Most people right now around 45 and 50 are wearing Artifact armor, which you get most of during your level 45 job quest and your chest piece for your level 50 job quest. There's also Darklight and a higher tier, which you get by trading in tomes from dungeon runs.