What color are Hatsune's eyes? What film should I use for COS production?

Mistress's eye color is not fixed and changes depending on her hair color. You have to look at the version of the COS to decide what color contact lens to use. It's not a fixed color.

The formula is green.

Fruit Hatsune’s eye color is the same as her hair color. Red, orange, yellow, green, blue, and purple

Yuki Miku is ice blue, the same color as the edge of her skirt.

Sakura Hatsune is cherry blossom pink.

The matryoshka doll is blue on the outside and yellow on the inside.

If you want to make the in-game version, just choose the color you see. Because the game version also comes in a variety of colors.

The official version is just the color of the formula. Unless you want to make the formula Hatsune, you don’t need to follow that color.