This is an emission nebula, which burns predominantly red. Here's a more accurate image color-wise:

However, with precision color balancing, other colors become evident in the nebula. For example, there is a blue cast in the middle from the starlight in the middle scattering the reflected light, completely undetectable with the naked eye. These colors become evident with the right processing techniques.
You know me, always trying to find the hidden color of everything :)
Just for fun, here's the image before edits:
