I recently went flying with a friend and took my Nikon D3300 DSLR up with me to get some aerial shots. As I'm still learning I set the camera to RAW+JPEG so I had some pics and could also have a mess about with the RAW process to learn some new skills. I have UFRaw to open the .NEF and TheGimp 2.8 to edit them. I opened the RAW files and they open in black and white, yet the JPEG ones are in colour and when I tried the RAW Processing feature on the camera itself the pictures are in colour also, its only when I open them to edit them that they come out in b&w. Any help would be greatly appreciated as I am completely stumped as to why its happening. Thanks in advance! :)
Raw editors usually ignore the in-camera settings for things such as color and contrast. Instead they apply the user selected profile from the application you use to open the raw file and convert the raw data to a viewable image on your screen. It sounds like you (or someone else) have selected a B&W profile to be the default way your application opens raw files. You need to change that default profile to one that renders your images in color.
I have no experience with the software tools you mentioned, but googled up a discussion thread on the UFRAW sourceforge site, where folks mention having an issue with RAW opening in B&W, and rbellavance posted a list of things to try that I paraphrase:
Go to the Grayscale tab.
Check that None is selected for Grayscale mode.
Go to the Corrections tab.
Check that the Saturation slider is not 0 (or near-zero);
1.00should be normal.
As a last resort, quit UFRaw and remove the
.ufrawrcfile from your home directory.