I totally agree with the others that the color should be something that was not available on any of the USA models. My #1 color pick would be the 2006 MINI COOPER color of "PURPLE HAZE". It is a dark purple metallic with pearl that is absolutely gorgeous in bright sunshine.
I'm confident once you see this color in person on a MINI Cooper, it will be the color you choose. As a darker mica color, the "PURPLE HAZE" color would fit along the same production VX lines as a Dragon Mica or FoxFire Mica and would look totally OEM factory as an optional color by Isuzu.
Don't go with a loud color that is too obnoxious like a Kawasaki Green or Lamborghini Orange, as it just wouldn't look OEM factory and would likely limit marketability in trying to sell the VX to a wider market. The "PURPLE HAZE" color is refined and elegant with class, while being totally different from everyday common colors.
BTW-- My #2 color choice would be the Cadillac "CHAMPAGNE" metallic (aka Gold Mist Metallic) color found on the new Escalade. The Cadillac Escalade "CHAMPAGNE" (aka Gold Mist Metallic) color is also a pearl and would look extremely elegant, but would really be a striking contrast against the dark cladding of the VX. Pick this paint color if you want the cladding to really "pop" as a contrasting color.