Yes, it is possible with much filter experimentation and understanding of the environment to get a variety of colors.

The environment yields different colors in full-spectrum because of its variance in reflectance from UV to IR.

Plants, minerals, water and manmade materials reflect colors in the ultraviolet, visible and infrared differently. Following is a chart showing the reflectivity of common materials as measured for remote sensing purposes at my own place of work.

It is the combination of a full-spectrum sensor/camera, specific filters (some shown in plot above) and the distinct reflectivity of particular materials that gives rise to various colors within full-spectrum and infrared color photographs.

From the combination of filtering properly for the given environment and lighting conditions, you can get a variety of colors and more intense skies.

FYI: For more examples, see my galleries:

So..... how does a full sprectrum or infrared sensor give colors that we can see?

Recall that:

• All light detected by the camera goes to one of three color sensors (RGB)
• Without a hot mirror, the camera would record very different colors/images
• The IR light from 700-1000nm that goes to each of these RGB sensors gets translated electronically from IR to a red or green or blue value
• The translated values of the IR to RGB are what we see as "infrared color"

• Infrared color is generated by use of common filters (R66, 89B, 87C), as well as specially designed filters to achieve various colors and contrast
• The colors seen in the full-spectrum and IR photos are both real and surreal, depending on what filter and processing is used
• Trees, bushes and plants of all types reflect the IR about four times more than green light
• Trees and plants in the full spectrum appear mostly white, pink, turquoise, yellow or other pastels, but rarely do they appear deep green
• In Full Spectrum filtering, there are a wide range of colors that can be achieved
• In Infrared filtering there are usually two color combinations: red / brown skies and blue skies
• Each is achieved through either positive color or negative swapped-color using a simple and standard technique among infrared photographers
• Positive in infrared is red/brown skies. Blue skies, often more appealing to the eye, are actually the "negative" or swapped color for infrared.
• Fiery, neon red skies occur when the sky is actually extremely clear blue to our eyes
• In the Colorado mountains, on the clearest day, the sky will look aflame in the infrared. Haze at the horizon will look yellowish or pale brown.

The following are image examples of the effects with different filters (taken at Golden Gate SFC, US).

Most importantly: In the infrared or full spectrum, since the light recorded is not even what the artist sees, her/his imagination is now fundamental in filter and process choices.

• A question I get often is, how do people look in the infrared?  -- The biggest differences are that the skin is semi-translucent and the eyes (iris and scalera) often switch colors (brown eyes become blue, blues go brown/dark).  And the hair, which when dyed will present high degree of IR reflectance (shown often as bluish in color with IR-only filters).

  See for yourself--I have worked  with local models to produce artistic infrared people-photos. 

FYI: Click here for samples of IR model work: