#Only in 1.16+ you can use hex color like this "&#310340<player>has joined the server"

Join_enable : true
Join_message : '&e<player> &6has joined the server'

Leave_enable : true
Leave_message : '&e<player> &6has leaved the server'

Welcome_message_enable : true
Welcome_message : '&6Welcome, &e<player> &6has joined server for the first time. Have a nice day'

Staff_join_message_enable : true
Staff_join_message : '&8Staff : &7[&a+&7] &e<player>'

Staff_leave_message_enable : true
Staff_leave_message : '&8Staff : &7[&c-&7] &e<player >

Send_Message_To_A_Player_On_First_Join : true
Message_To_A_Player_On_First_Join :
 - "&6----- Line 1 -----"
  - "&eWelcome, &6<player> &eto best server."
  - "&ePlease reads /rule"
  - "&6-------------------"

Send_Message_To_A_Player_On_Join : true
Message_To_A_Player_On_Join :
 - "&6----- Line 1 -----"
  - "&eWelcome, &6<player> &eto best server."
  - "&eThat's on normal join"
  - "&6-------------------"