Every pixel one by one I changed to colour to what I thought was best.
Nah just kidding 😜. There’s a tool on the app I use. But if you want to do it correctly there is some bit of colouring on top. Which I didn’t do so it’s a bit messy…
Also little tip:
When you select a photo of clouds, select it carefully. It can make your work so much easier. Try to take a photo that has the same lighting and colours. For example I just made this to show my point. I literally put it over my original screenshot and cropped out random bits and pieces. Since the colour of the sky was roughly the same, it wasn’t a problem if I wasn’t precise. Plus clouds have kinda random shapes anyway