These are truly stunning! The Empress especially seems to speak to me, and that card rarely does. You've done a lovely job clothing The World, too.
About the coloring -- You probably know this, but it's common for graphic novel/comic illustration art to be inked and colored by different artists. They're very different skill sets!
I'm sure you could find someone talented to do the color or even just subtle tints for you, in ways that would compliment rather than overpower your ink work. Many charge a lot less than you'd expect, and some might even do the work for a share of the publisher's fees, rather than upfront costs. (I can't swear on that, but having a major publisher already interested is a big plus) There are websites that help match up comic/graphic novel illustrators with each other and with jobs -- you can see samples of their work to see who might be a good fit. Let me know and I'll get those links for you!
Again, really, really nice work!