its very rare ... normal dark blue (the standard color) is already rare, but this color (MSO Atlantic Blue) was to my current knowledge only used 3x on the 720s by McLaren - one was the official show car for GIMS 2018 ( I know the current owner) + 2 customer cars (mine and @Rarity) ... there are however other MSO dark blue tones (Clyde Blue, Pacific Blue, Glasgow Blue ???) ... additionally the color was also used for 3 Sennas and 1 SpeedtailBecause I want to buy it
All jokes aside, the dark blue on your car is fantastic. I was looking for a dark blue one for sale like yours for a while and I just never could find one. Rare color.