Here is what I can think of, at the moment :
There is this one http://www.mangago.me/read-manga/restless/ it's relatively new
There is also http://www.mangago.me/read-manga/hyacinth/ though it's shounen ai but it's super fluff
This is also relatively new http://www.mangago.me/read-manga/as_sweet_as_this/
This is no omegaverse but there is "mpre...... 5 reply
I know one called 'Marry Me alpha' but it's two alphas and slightly blackmailing
Sorry I'm not really sure about full colour but if you're okay with black and white try:
- Katsubou Animajemera ( large physical appearance omega kind of like love shuttle.)
- Kashikomarimashita, Destiny ( Really cute, alpha and omega that are trying to stop destiny ...... 2 reply
Hmm the side plot of the story is omegaverse-ish...blood link.
A vamp attacks a girl for blood and he in turn gets kicked by this heroic guy. The girl is saved but vamp is still thirsty so he goes for the guy. It turns out the guy is part lycan/wherewolf and the vamp woke that part of him up... and the poor guy becomes the vamps thrall. Sexy tim...... 1 reply
love shuttle is a very cute omegaverse webtoon. It's about a half-omega who has the physique of an alpha and hasn't had his heat although he's already twenty-something. reply
To be honest there aren't many because omegaverse is still a mostly Japanese manga thing and only starting to get into the Korean side which makes the full color webtoons reply
