Here is an image of Andromeda Clouds in HaRGB, with 23 hours of total exposure.
Captured during 6 nights of New Moon from Pioz, Guadalajara, Spain.

It is the biggest project I have done since I started doing astrophotography and it is an honor for me to be one of the few astrophotographers who have photographed these strange clouds in color.

You can see more information and photos in my section of the website:
https://aipastroimaging.com/m31-ha-clouds-hargb/

In full resolution:

https://aipastroimaging.com/wp-content/uploads/full-resolution/Andromeda_Clouds_16200_HaRGB_horizontal_AIP.jpg

This photo was taken with this setup:

Telescope: Takahashi FSQ106EDX (f/5)
Mount: Takahashi EM-400 Temma2
Camera: Atik 16200 (Kodak KAF16200)
Guider: Lunático EZG-60 + SXLodestar
Filters: Baader Ha 7nm, Baader LRGB
Focuser: RoboFocus Rev3.1
Date: November and December 2018
Place: Pioz, Guadalajara, España
Software: MaxIm DL + AstroMatic
Processing: PixInsight Core + Photoshop CC
Exposure: Ha: 80x900s bin2, RGB: 12x300s bin2.

Total: 23h

Copryright: Álvaro Ibáñez Pérez