PoE Chromatic Orb can be a currency item that can be made use of to re-roll the Colour of sockets on a weapon or piece of Armour. Made use of to change present colors of the Sockets. Plenty of these can be identified through leveling and farming, from direct drops along with from Vendoring 3-linked R-G-B (red, green and blue sockets) items. Unless you play a very niche build, you ought to have a great deal of these lying around

Ways to getting Chromatic Orb

Chromatic Orb Recipes

The way to Use Chromatic Orb

Altering Color with Chromatic Orbs

NO.1 Ways to getting Chromatic Orb
Like most Poe currency items, Chromatic Orbs could be dropped by slain monsters, chests, and destructible containers. They also Drop from Arcanist's Strongboxes.
A single can also get Chromatic Orbs directly from vendors. Yelena will sell a Chromatic Orb in exchange for 3 Jeweller's Orb, and Tora will sell 20 Chromatic Orbs in exchange for 48 Jeweller's Orb after every day.
Chromatic Orbs can also be obtained by Vendoring an item with one socket of every Colour (red, green, blue) linked with each other. That can be indeed one of by far the most frequent ways to acquire Chromatic Orbs. In specific, this signifies you could get some Chromatic Orbs cheaply (ordinarily for about 1 Orb of Transmutation every, or less) by obtaining such linked items in the Vendors.

NO.2 Chromatic Orb Recipes:
1. An item with linked blue, green and red sockets = Chromatic Orb
2. 48× Jeweller's Orb = 20x Chromatic Orb

It's possibly the easiest of recipes: you merely vendor an item (of any rarity) with three linked gem sockets of different colors (RGB) and you'll get a Chromatic Orb. While it's certainly not the fastest approach to riches in PoE, you can continuously find them even though leveling and farming. A lot of players don't even bother choosing these items up to be around the lookout for them while farming in groups.
You can sell about 200 Chromatics for an Exalted Orb, not including the fact you could even need them for your gear. As I mentioned not the most beneficial strategy to get wealthy but each tiny bit helps, and regardless of getting inexpensive Chromatics are always in demand.
The set vendor prices restrict the possible exchange rates in the player market; as an example, a Chromatic Orb will never be worth more than 3× Jeweller's Orb on the player marketplace. Nevertheless, this holds only in 1 path; one example is, 3× Jeweller's Orb is worth a lot more than a Chromatic Orb on the player marketplace. Usually, only the vendor prices 2× Orb of Alteration: Jeweller's Orb and 4× Jeweller's Orb: Orb of Fusing are even close to the player marketplace values. On the other hand, many of the masters may supply valuable, superior ratios to vendors upon leveling them to particular points, like Vorici's 20× Orb of Fusing for 64× Jeweller's Orb.

Divination Card
A set of 5 Emperor's Luck1 can be exchanged for five Chromatic Orbs.

NO.3 The way to Use Chromatic Orb
Chromatic Orbs are mostly utilized to alter the Colours of sockets on an item. Sockets are a lot more probably to roll a Colour corresponding for the attributes of the gear getting modified. The larger the quality needs, the much more likely it indeed is to turn the relevant Colour: red sockets for Strength, green Sockets for Dexterity, and blue sockets for Intelligence. It is only probable to acquire red, blue or green Sockets applying this orb; for white Sockets, it is essential to use a Vaal Orb.
If one either wants to avoid randomness or wishes to acquire a particular Colour mixture that is unlikely in a specific item (e.g., having all red sockets on an Item requiring higher intelligence), one can alternatively make use of the Artisan's Bench supplied by Vorici. When obtaining socket Colours that an Item is already biased towards (e.g., acquiring red sockets on a chest piece requiring higher Strength), utilizing Chromatic Orbs manually is much less pricey than working with the Artisan's Bench. On the other hand, for getting a socket Colour that an item is biased against (e.g., acquiring green sockets on a chest piece requiring higher Strength), using Chromatic Orbs manually is commonly considerably more pricey than employing the Artisan's Bench. 
When Vorici is level 8, these recipes may also be applied to corrupted items in the cost of utilizing 1 Vaal Orb for every Chromatic Orb necessary. That is presently the only way the Colours of sockets on a damaged Item could be modified. 

NO.4 Altering Color with Chromatic Orbs
Chromatic Orbs reroll a gear's socket colors at semi-random. It is not entirely random given that it's far more most likely to yield a specific Colour according to the attributes from the gear in question. By way of example, if a Gear calls for more strength, the likelier it is actually to obtain red sockets and blue sockets with intelligence, and green with dexterity. Chromatic Orbs, even so, can not outcome in white Sockets, where gems of any color are usually placed.
Chromatic Orbs can also turn a particular socket to a specific Colour, which is useful for items which are unlikely to possess one specific socket color primarily by utilizing a Chromatic Orb. For example, if a gear only has Strength and Dexterity as a requirement, it will not have a blue Socket by merely using a Chromatic Orb.
Nevertheless, in place of getting employed directly, they'll be utilized as a requirement when working with the Artisan's Bench by Vorici. The item in question can have a minimum of one socket of a specific Colour for four Chromatic Orbs, two Sockets for 25, and 3 for 120. It is a steep price, but worth paying if you are a master crafter who wants the very best set of gears which you can earn by typical implies.
Chromatic Orbs do not care about how the item is linked. The only bias in coloring items is just how much essential Attribute the Item has, and that is directly determined by the defense form the piece of gear has. Two layers to this:
- Initially, layer = The trifecta the game is based around. Armour is biased toward Red and needs Strength, Power Shield is one-sided toward Blue and requires Intelligence, and Evasion is biased to Green and necessary Dexterity. Hybrid gear follows the same rule, i.e., a pair of Energy Shield/Evasion gloves is biased towards Blue and Green.
- The second layer = The tier of the base type. If it is a shallow level base (ex. Straightforward Robe (Power Shield) you obtain at the exceptionally very first zone, it includes an extremely low bias towards Blue. Whereas in the event you located a lvl 60+ base, like Occultist Vestment (Energy Shield), it is heavily biased towards Blue.)