
Gray stucco houses are becoming increasingly popular, as I see more and more pop up but designing one can be difficult for some people due to the naturally neutral tone of the gray.
Other elements like trim and roof color also come into play and make it even more confusing!
I wanted to break down some of the "successful" gray houses I found online to see what made them successes. Here we go!
Light Gray Stucco Houses:
I did some digging and after sorting through tons and tons of light gray stucco homes I found that I really like the lighter gray tones myself.
Since the color is lighter you tend to lose some of the trim details but you get a blended, free flowing look.
Take a look at some of the best houses I found online that were done in a lighter gray tone and see what you think.

bobvila.com
Dark Gray Stucco Houses:
I wanted to include darker gray homes too because I think they have a unique look to them that is very different than the lighter colors.
Certain elements like the trim, accessories, doors and windows tend to be prominent if the correct combination of colors are used.
Roof Colors & Styles That Go With A Gray Stucco House...
Since gray is a neutral type of tone, virtually any color of roof will work, from what I've seen anyways but the end look is slightly different though.
The lighter roof colors that people choose, along with a gray stucco color usually tends to blend in better and doesn't really stand out.
If you choose a darker roof color however, then the contrast between the roof, stucco color and trim color really stands out and gives the house a completely different look altogether.
This is also true in the case of roof tiles that are reddish in tint.
The picture on the right (or below) shows a gray stucco house with a fairly light colored roof that is grayish in color and really blends with the stucco color.
This makes certain elements like the white trim, rock work and stained timber stand out more in the picture.

Gray Roof Brings Out Trim and Timber Colors
Here is the same exact picture but I made the roof a darker black color to show the different contrast and how your eyes change their focus on certain elements.
The roof is a dark black and those details seem to get lost a little more due to the stark contrast of the roof.

Same House With A Black Roof
Here is another variation of the roof color in a much lighter gray which really blends in with the color a lot more.
Notice how the details of the trim, rock, front door and timbers fade a little more just by having a lighter roof color.

Same House With A Lighter Gray Roof
Trim Colors And Styles:
Most of the trim colors for the gray colored stucco houses I saw were really a white colored trim of some sort, for the most part.
Brighter whites really stood out against the gray stucco but more subtle whites weren't as pronounced, making a more balanced look overall and shifting the focus away from the trim to other elements.
This example shows a very bright white trim color on the medium gray colored stucco walls.
The contrast is noticeable and prominent and will work better with medium to darker colored gray tones.
If you were to use a lighter gray color, the bright white would still work but the contrast would be drastically reduced and would tend to blend more, which works better for simpler, sleeker designs.

Bright White Trim With Darker Gray Stucco
Here is an example of a garage that has a lighter gray stucco but still uses a bright white trim along the roofline, doors and windows.
The contrast is not nearly as noticeable as it is in the darker gray image shown above.

Light Gray Color With Bright White Trim
The second picture shown here really has a minimal amount of trim and doesn't stand out as much off of the wall.
The trim is a much more subtle white color, making the rock work and texture of the stucco stand out more, as opposed to the trim elements.
Lighter trim colors work to blend the colors more and highlight other elements of the building.

A Toned Down White Color Used For Trim
Some gray houses I found have little to no variation in trim color which makes the whole thing blend and really has no features that really stand out.
If you have a simple design with virtually no trim pieces than this look could work.

Virtually No Trim Color Variation
What Gray Colors Are Available?
Out of all of the gray tones and colors available, I have noticed a number of patterns among the different shades.
Some grays are very light and have a whitish-gray tone, some have a bluish or greenish tint to them and so on.
You can see the different color hues within the various gray tones and you need to consider which tone you like best or which one goes with that overall look you are trying to achieve.

Light Gray Color

Very Light Gray Color

Medium Gray Color

Darker Gray Color

Blue-Gray Color

Green-Gray Color
Gray Colors From Stucco Manufacturer's Color Charts:
Here are some examples of various gray colors from a few different stucco manufacturer's color charts that I wanted to include.
These are not all of the available gray colors but I think it will still help you to see what is offered and comparing the different tones will be helpful to some people.

Omega 35 Cloud Gray

Omega 414 Cloud Cover

Omega 9225 Chinchilla

Omega 9228 Stone Age

Lahabra Agate P-505

Lahabra Titanium P-1661

Lahabra Thunder Sky P-2090

Lahabra Mesa Verde X-215
Also check out the available colors from other manufacturers, if you are using another manufacturer's products or you don't like the selections available:
Make sure you check the colors on an actual (physical) color chart and then verify the color choice on the wall first before ordering all of the material.
What Rock Goes Well With Gray Stucco?
Out of all of the pictures of gray house I found, I noticed that some of them had rock incorporated into the design.
The color schemes were basically the same, having a lighter colored rock consisting of whites, light beige tones and some lighter gray tones.
The lighter colored rocks seemed to work better than the darker colored rocks and tended to blend in rather than stand out in most of the designs I found.
Virtually any style or shape of rock will work too, as that seemed to have less of an impact on such neutral color schemes.
The type of rock will be dependent upon the style of house you are building (modern, mediterranean, craftsman, tudor, etc.) and personal preference.
Products I Think Would Work Well:

Cultured Stone's Echo Ridge

Eldorado Stone's Koryak Ridge

Eldorado Stone's Nantucket

Coronado Stone's Eurovilla

Coronado Stone's Artisanledge

Glacier Stone's Falls Creek Ledge
Some styles of stone may not have a lighter color available, so you will have to find a style you like and see if they have a color scheme that will work. You can sometimes search by colors too.