I am using the following command: 

steghide embed -v -f -ef embeded.txt -cf desert.jpg -sf desertWithSteg.jpg


Enter passphrase: 
Re-Enter passphrase: 
reading secret file "embeded.txt"... done
reading cover file "desert.jpg"... done
creating the graph... 95 sample values, 338 vertices, 44029 edges
executing Static Minimum Degree Construction Heuristic... 95.9% (1.0) done    
writing stego file "desertWithSteg.jpg"... done

On the resulting image, desertWithSteg.jpg, there is significant colour loss. The colours are much more dim
and washed out. I couldn’t find any suggestions on the cause of this problem 

The two images are available on the following link. Any suggestions as to what might be causing this?
I am  using OSX 10.9.1 with steghide 0.5.1 installed via macports. 


embeded.txt only contains the sentence 'this is a secret message'