In PS, use Adjustments -> Hue/Saturation and select blue and/or cyan and fiddle til it looks right. I know with my FLI 8300 OSC with an LP filter, I have to manipulate the blues a LOT.
I also find with CCDStack for OSC that it is IMPERATIVE to debayer PRIOR to registering and stacking, otherwise you get a "tartan" OSC grid effect, or very distorted colouration. Also use the Colour adjust to change the background - I always desaturate the background. It helps balance the blues a bit more too.
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