Using the X2 Green Pumpkin I'd just cut back on the amount of colorant used. If you are making a 4 ounce batch and the lighter version on the color calls for 5 drops, add 3 to start and maybe a 4th drop after cooking and checking the color.
I did a color comparison using an already-shot M-F color against the Zoom site's color plate a near dead ringer is MF56, chartreuse pumpkin. 20 drops to 4 ounces.
Looks like some black and gold flake too.