
Liquore Strega is an Italian herbal liqueur flavored with around 70 botanicals and colored yellow with saffron.
The closest swap, in the same amount. About as strong and sweet, and yellow too, but it tastes more of honey, with a different herb mix.
Bénédictine
Also works measure for measure, but it is darker, so the drink loses the yellow color.
One for one, the drink takes on a strong anise note.