Vegan hair dye?

I’ve been letting my grays grow out leading up to my 40th and I’m loving it for the sheer fact that I hate keeping up w appointments and the cost, and I’m trying to heal my hair from all the dying and heating I’ve put it through. I feel liberated haha. I’m going to LA for my bday this summer and may want to cover the grays for that but prefer something vegan/natural. I have light brown chestnut natural hair. I found that Punky Colour brand dye for my sister but it only comes in funky colors. :) I have a henna dye by the Henna Guys I bought awhile ago but it seems complicated to apply. Any suggestions? Thanks! xo 🌱