Emerald Dreams means in slang: A balance between sleep and total bliss. You can achieve absolute happiness by your mind.
(in Slang Dictionary, added by Drwhofan7Cabal)

What else does Emerald Dreams mean?

A person’s ability to feel a balance between sleep and happiness. This state of blissful sleep is nothing but pure happiness.
(in Slang Dictionary, added by Lucrecia Montoro)