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@RoyalChick -- Have you tried in low light? Near or just after sunset, or early morning, or in deep shade. So that the camera doesn't try to compensate for the extra ambient light & wash out the subtle shades. That's when I get the best Buckeye pictures with contrast in their feathers showing. You have to outsmart your smartphone....The camera tries to pick up as much light as possible from the point of focus, and with less ambient light bouncing around, it gets what it needs from the feathers' own reflection and they come through better. Also, and I'm no expert with this, but I suspect something at work in the way blues are a big factor in ambient light (the blue sky, snow and and cloud filtering). That could be affecting how lavender feathers appear. So experiment with strong ambient blue light versus little, and also try the different filters available on your phone too. I'd love to know the results of your experiments, if you try.