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I agree with your observations on dust colour too. There is the darker redder dusty regions and then there is the bluer stuff like various ghost nebulas and the cirrus stuff in both of the images you've posted.
I'm attaching another random part of the sky that shows the same thing. It doesn't contain the same dusty regions like in the LDN catalog but more like the cirrus stuff and it is EVERYWHERE in the images I'm currently working on. It is in every single patch of sky within 20º of the Milky Way in every direction.
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