half mourning

a mourning garb less somber than deep mourning, usually following a period of deep mourning.

the period during which it is worn.

Origin of half mourning

First recorded in 1810–20

One was middle-aged, or thereabouts; the other young; both were dressed in half-mourning.

She and I, Volume 1 |John Conroy Hutcheson
And surely grey is what is known as 'half-mourning' too, is it not?

The Orchard of Tears |Sax Rohmer
The ladies wear a kind of half-mourning, a stylish sort of reminder of original sin.

Ireland as It Is |Robert John Buckley (AKA R.J.B.)
The Countess of Montalto is herself again, and still in half-mourning for her husband.

A Lady of Rome |F. Marion Crawford

Then Lois came into the room, hatted and gloved, in half-mourning.

The Roll-Call |Arnold Bennett

half-mourning

dark grey clothes worn by some during a period after full formal mourning