If the interior fiberglass furniture is a light
green also, then I would recommend that you leave the top half of the exterior as is and paint
the bottom half as well as the canopy top a darker green in the same value range for contrast. Refer to the FGRV logo at the top of the page and see how the bush starts with a real light
green and then progresses to stronger greens. Do not jump to a real dark green, one just a few shades darker than the lime green.
Leave the canvas as is, and do not paint
over the vents, screens, outlets, etc, rather highlight them in white. Then do the same with the interior. Leave the furniture light
green and accent the doors with a darker green, with a white around the edges.
the outside with a paint scheme that is radically different from the interior will cause a visual shock to your eyeballs when you enter. The exterior and interior colors should coordinate with and compliment each other, not fight each other visually.