The description under that photo is not accurate, Savoia, and I realise you probably copied it from elsewhere. "Slate green" is a dark grey/green, nothing like as bright as the helicopter.
HA-LFB, and indeed its sister ship LFE which Mark also owned, are painted in "DuPont green" which is relevant because LFB started off life as the corporate hack with DuPont Australia, with the US registration N223DP [DP=DuPont]