The “Hue” tool in Photoshop:
Hue is a great way to get quick color changes within your image, whether you want to change the color of an entire image, or to create colorful coursings of brick and tile. Another great application is to change the color of a house or building texture in order to quickly create lots of variety within your 3D scene.

Here are some examples of what can be made:
Note that white tile grout and window framing do not change colors.

Colorizing A Building:
The great thing about colorizing architecture, is that the majority of changeable colors occur on the main spans of colored surface. Using HUE, the white trim used on windows and doorframes is mostly untouched and remains as white. Blacks also remain mostly black, and greys remain mostly grey.

So like magic, only the major painted areas are converted to your new color.

Let's begin by opening a facade image. There are over 800 in the "Mix and Match" section on the Texturama website. Feel free to use the 400x400 samples to practice with.

Start with a building that has some color to it. Here we have the basic red building.
Open your image in Photoshop, and click on "Image>Adjustments>Hue/Saturation"

CTRL+U is the shortcut
("U" sounds like "Hue")

Now you see the building change color to orange. Note that the trim and window treatments barely change colors. The sky changes colors, but if you're using this in 3D, you can mask it out by creating geometry specially created for the building only.

And the building will look like this:
-also note that the "Saturation" slider has been lowered so that the colors aren't too saturated.