Nice image - I think it's probably a more accurate colour rendition than most. If you're using the pixinsight LRGB combine process in the manner recommended, where in the second step you recombine RGB and luminance, you can boost the colours by sliding the saturation slider to the left - this will give the effect you're looking for. I did that and got
this slightly oversaturated version that picks out the stellar populations nicely which may be what you're describing?
cheers,
Andrew.