Blade of the Three Fancies

[Victor Zajic]

From Inner Sea Gods, this magic glaive lets you use Color Spray 1/day.

The caster level of the item is 3rd, so the Color Spray would be CL 3, but what casting stat should I use to set the DC?
Minimum for 1st level spell, 11?
My casting stat?
12, the minimun to cast level 2 spells as a wizard or cleric?
or something else?

[the Lorax]

Sounds like 3rd level caster with an 11 stat.

DC 11.

yea.