Found this website https://colorndrive.com/en/touch-up-paint/honda-acty?year=&baseColor=WHITE I am sort of in the same boat looking to do some touch up at some point I'll keep looking.
Check in the passenger door frame above the door lock catch, there is a sticker with the color number from Honda. For example my white 1997 Honda Acty HA3 truck, Frame: V-HA3 has the paint no. NH-528 https://spareto.co.uk/oe/hondanh528 the complete Honda # is probably 14999-11-nh528-0 Touch-up pencil Honda NH-528 New White (12ml) https://www.lackstift-shop.de/touch-up-pencil-honda-nh-528-new-white-12ml Here a seller in the US: CRETE WHITE Aerosol Touch Up Paint 12oz for Honda NH528 https://www.ebay.com/itm/CRETE-Fits-White-Aerosol-Touch-Up-Paint-12oz-for-Honda-/133216283519 , Ebay seller: colormyauto1 Basically any decent paint shop can mix for you the exact color when you have the exact paint number from your paint sticker.
Thanks for the replies. Very helpful I was think about the local store also. I could bring in the tail gate. I have a local store that will match the paint and make me touch up, spray cans, etc