Really bringing out the detail now Jeanette. Fantastic job
This is the simplest way to add colour.
Go to Image-Adjustments-Selective Color
You will see a bar at the top of the drop down window which has Red selected
Move the Cyan slider to the left this will add more red
Move the Majenta slider to the right this will add more Majenta
Just play around with each slider and adjust the tone to your taste
Then click on the colour panel bar and choose Majenta
Again move the Cyan slider to the left and the Majenta slider to the right adjust to tone.
You will get used to the strength of the colour added by pushing the sliders to the max then just slide back until you reach a suitable saturation.
Do the Selective Color early in your processing it's best not to push your Levels adjustment too far until you've added the colour first adjust Levels afterwards.
Hope this helps
Barb
Eta Carina Nebula
My best one so far. 
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