It almost looks like your large ship could fit inside the large landing craft.
What are those called, the floating drydocks which position under a damaged ship and then rise up to effectively carry the ship, like a drydock? That's what that large landing craft looks like. Two cruisers should fit in there with room to spare.
On the other hand, there seem to be skirts around the medium and large landing crafts, as if they were actually hovercraft... and I have been hoping for some hovercraft models which can operate equally well on both water AND land.
And, yes, the color scheme is generic enough--green always wins my vote of confidence. And I like the black/yellow caution stripes on the forward ramps/doors.