I just double-checked it, it's 28 days in total (7 days to trigger re-coloring + 21 days to trigger deletion). If you leave your account on april 1st 0:00 you will be gray on april 8th 0:05 and be deleted on april 29th 0:05.
Best regards,
Be2-e4
Many thanks for this answer 
Regards,
Reyals
26 Eggs
Reyals - comx3
Hi everyone,
I was just wondering how long it would take for inactive players, (governor) to be removed. I have looked on the wiki for the other version of Travian, but have found no exact amount or calculation for how long it takes for an inactive player to disappear. Looking at inactive players that have disappeared, I assume it is about 30 days before an inactive player is removed, but I would just like to have this clarified.
Thanks for your time,
Reyals
Haha, thanks guys
I forgot I had posted this, but the gameworld ended before they had been inactive for 3 weeks, so I was not affected. Thank you for the many replies though
Hi guys,
I was wondering, what happens if a player you are sitting for goes inactive? Can you still sit for that account, like spend/move resources, send attacks/reinforcements, or is this against the game rules? One more thing i would like to know, is whether you can chief a village from someone you are sitter for?
Thanks for your time.
Kind Regards,
Reyals
Hi everyone,
I was just wondering how long it would take for inactive players, (governor) to be removed. I have looked on the wiki for the other version of Travian, but have found no exact amount or calculation for how long it takes for an inactive player to disappear. Looking at inactive players that have disappeared, I assume it is about 30 days before an inactive player is removed, but I would just like to have this clarified.
Thanks for your time,
Reyals
