Hair dye first trimester (attending friends

Hi all, is there a hair dye (prefer home diy) or salon dye that is safe during first trimester? Attending a friend's wedding reception and have so many grey hairs ☹️🫣 I previously used to touch up grey roots using revlon home dye before conceiving, it is ammonia free, but im not sure if its safe for pregnancy.. #pleasehelp #firsttimemom #pregnancy