So apologies I've only had my 2nd pool going a minute and have been busy in the aftermath starting to put the yard back together. I plan on piecing together a more detailed collage at some point for your exact question, because the specific color is SO not that important. I have blazing sky over my pool and it should be as consistent as possible and it's still all over the place.
Full sun with the left side shading itself :
These next two are the same moment in time changing view 90 degrees :
Same moment in time looking near and far:

Windy/overcast day :
Daybreak with sun hidden in some perfectly placed clouds, making the sky yellow
This is just the tip of the iceberg. I have seen a few dozen other shades ranging from electric blue to ink black as the sun goes down.
This liner is much lighter than our old dark navy blue liner and they overlap 90% of the shades. All you have to do is get in the general ballpark of your preferred color and you'll see it and 52 other variations you also like.