There're so many dahlia varieties, in so many colors, shades, shapes and sizes.
Flowers usually change colors when they get more and more mature.
Sometimes, even one single dahlia tuber can give different flowers, like this one:
Edge of Joy, showing a bit of its parents, I suppose.
I like many varieties, I can't really choose one which I like the most, but there are some, that I like more than other varieties.
They are, for example, White Perfection and Lavender Perfection, huge, gorgeous dinnerplates dahlias 💙