Thank you for your opinion, ADAM BOURASSA. I tried to compared the fully dry paper sample and compare again with my car seats this morning, and the big difference still cannot convince me to process the final dying step. I would say that the dye in my hand is "Brazil" (dark grey) (code 263) rather than grey (code 268). It is very inconvenient as the car cannot be used or else very embarrassing to drive it with the interior in process...
In case if Leatherique can't correct it, is there any other possible way to source excatly the code 268 grey?