Hi Ben,
First of all well done on this image, your stars are round, composition is pleasing and the data is solid.
As to Color palatte, well there’s two schools of thought, but both agree that one should try to represent all three wavelengths in visibly different hues.
Ha tends to be rich and as you have noted, can easily overwhelm the image.
Should you choose to render it in the ‘natural’ M&T green driven style then you’re nearly there, just dial back the ha luminosity a tad and watch the histogram so the the toe doesnt sit on the far left, leave some space and as Lewis rightly mentioned earlier, the subtle shadow details will show up well.
Or, as those in my ‘artistic ‘ camp prefer, use selective colour to basically eliminate green altogether and render it orange.
O3 to blue & S2 to red, (which then appears yellow).
Nb colour however is a highly subjective, ‘Dealers choice’ opportunity to show the three wavelengths in whatever colours you like, as long as you can see all three and that they are pleasingly balanced to the eye.
Fwiw here is my version-
https://www.astrobin.com/166688
A bit different to yours but that’s the way we roll in NB!
Google or search up that target on Astrobin and see what others have done, and make your colour selections based on whatever rows your boat!
Good Stuff, well done and keep going
