what is the rarest blue dye in ESO?

The rarest blue dye in ESO is generally considered Abyssal Beryl Blue , since it comes from the Maw of Lorkhaj trial and is repeatedly cited by players as one of the hardest blue dyes to obtain.

Quick scoop

If you mean “rarest” in the practical, player-earned sense, Abyssal Beryl Blue is the strongest answer from the available ESO community references. Some other blue dyes are also rare or annoying to farm, but this one is the one most often called out in discussions about hard-to-get blue dyes.

Why it stands out

• It is tied to a trial achievement rather than an easy quest reward.

• Players mention it specifically when asking for the blue they see on costumes or armor.

• ESO Fashion’s dye listings also show other blue dyes as rare, but the community examples point most strongly to Abyssal Beryl Blue as the standout.

Other rare blue dyes

A few other blue dyes that players commonly consider valuable or hard to get include:

• Blackreach Blue.

• Arcane Blue.

• Stalhrim Chrome.

Bottom line

If you want one name, go with Abyssal Beryl Blue. If you want, I can also list the top rare blue dyes in ESO in a simple HTML table.