yes the colors of pretty much all plumeria will be lighter in a cooler climate. heat and humidity really bring in the colors.
It is plenty warm enough in your area If you can start them outside it would really be best. At least during the day when the sun is out. Just keep them out of rain until they have rooted.
Reds can be hard to root so be patient if it takes awhile.

I have celadine but not Singapore so i cant compare them against each other but can say they are both very common amongst growers for the scent. I believe Singapore is stronger in terms of distance away from the plant that you can detect it.

Good Luck
Mike

Thanks for your reply!

You're right that your colors won't be intense in your climate, and Donald Angus is not one I'd recommend for beginners. (It's nickname is Donald Anguish.) Kauka Wilder has been pretty easy going for me here in Texas but I don't know about cooler areas.

If you can find rooted plants that would be best, as we're getting a bit late in the season to start. Rooted plants will just give you a big head start towards seeing blooms.

Definitely Celadine over Singapore for your area. Singapore can be very prone to black-tip. Good luck, and let us know how it goes!

Thanks Jandey that's very helpful.