I think I am cheating a bit.
This is not exactly blue; but this photo contains the two colors I like – blue and green.
Like the other photos, the water is blue.
The photo was taken in the Plitvice national Lakes in Croatia.
Again, the water has a lot of calcium.
retireediary 
The two are serene.
Thank you, Lulu 🙂
lovely….
🙂
My favorite colors too!
Glad that you like the same!