I'll pass on all of it.... not my choices.... but I'm from New England....

I see Xmas & that isn't good. I'm not for light blue either. I think you should re-think the whole thing & see a color specialist at the paint/hardware store.

P.S. Client installed a metal roof on new house & now cell reception is horrible.

I am not a fan of light blue at all.  That aside, independent of the house color choice, I am a fan of a deep wine burgundy door.  It is real popular in my area. 

For my taste a 3rd colour would be too busy.

This might sound silly, but in my experience it seems that blue houses take longer to sell for some reason... While a red door is good feng shui, I think with the green roof it might look too X-massy, so would go with the matching green.

Emerald green

I like red because it's a power color. But might be too much if the roof is also green.

I'd vote for the matching green!

As it is Red. It's a proven door color. I'd go with the emerald green if you were planning on adding matching  trim, shutters, etc in emerald green. 

RED!  Definitely!  The green may not match that roof and the roof will also fade.  I have a 3-year old green roof and you can't tell it's green any longer! It looks black now so, the red really pops.

I'd go Emerald Green Bob Crane but I'm not a real trend setter.

Bob Crane I think, light brown can fit better.

If you are doing this for yourself, than do whatever makes you happy.

If you are doing this to flip, than start over with the colors, they don't make sense.

Eve

Not a fan of either. Black would be my choice.

I think I would have chosen a different colour for the roof... but each to their own... dark slate grey would be nice, with a RED door!!

Red

Fire engine red

What color will the trim be?

I vote for red.

Bob Crane Green

I would say it will look good at Easter.

Green to match the roof.

If red, you may get some unexpected visitors. Go conventional Bob

I am going for red!

Green

Only 3 colors should be seen from the curb.

One homeowner thought a GLASS front door was a good idea.

Seriously, from the street you could see, unobstructed into the house.

A creepy way to live for 30 years, in my  ever so humble opinion.

With light blue cedar shakes? I'd choose green.

Ruby red! With some red and white flowering plants in front, it will be quite a fetching cottage.

No doubt red

Red

Tough call

As it is Red. It's a proven door color. I'd go with the emerald green if you were planning on adding matching  trim

Please, no, not the emerald green. Stand out red is a winner.

Red they say all the time.

Bob - I think you would want something to match, so would probably go for emerald green or light blue, or maybe simply white if everything else is so colorful. Don't want too many different colors on the exterior of a home.

Red would make it too Christmas like... which is great around the holidays but not so special as you get away from the December page of the calendar. Match it with the roof... shutters, etc. Less color competition builds appeal. Play it safe.

Bob Crane - well, 64th suggestion - if that helps. Emerald Green should be my choice.

I think red.  I like the stand out idea.

Red

Emerald green and light blue?  hmm....match the roof, if red is the only other option. Have to agree with the others that the color combo is no an attractive one.   

Maybe red.

I'd probably use green to match the roof.

Green but I wold go with more of an earth tone.

Paint the house white with a red door and a red roof.

Red door means a safe stop for travelers, the mortgage was paid off, our the mouth of the house is allowing the chi to enter....energy.

Green door represents traditional values, health, safety, harmony...tranquility.

Red

I prefer red doors myself - but all of a sudden Black is making its way into the market - go figure

The color is a little "busy" for me, but I guess let's just go with red

I think red.

I like Green :)

In Scotland, home owners paint their front door red when they pay of their mortgage.

I'm a red door kind of girl.

I think an orangey red might work. Something that doesn't make it look like Christmas!

White

My vote is red. 

Red, with Burgundy as a backup!

Medium blue, or dark gray.

Green.

No idea

Beige or yelow

green does not accetuate unless you have lots of trees.

I think red would look very nice and offer a little contrast and pop.

Bob,

Color is a matter of preference.  I happen to like both colors for doors.,,Some cultures believe that a red door will keep the evil spirits away.  A

red hands down

I vote for bright red

My choice would be black but from two colors you have provided I'll say red.

I answered red before reading the other answers.