You got a lot of detail there and I like the delicate blues. I presume you don't like the browny coloured neb area. How did you create an RGB combine?
Neil Fleming has a formula for bicolour at his website. Its Ha as red, O111 as blue and an artificial O111 x 2 + Ha all divided by 2 using pixel math as green (I think I have the colour assignments right).
That usually gives a very light creamy, very light brown colour which is quit pleasant and leaves the blues intact.
Greg.
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