What colour is this? – Koja je ovo boja?

What colour is this?

Koja je ovo boja?

What colour is that?

Koja je ono boja?

It's green.

To je zelena.

It's red.

To je crvena.

It's blue.

To je plava.

It's yellow.

To je žuta.

It's brown.

To je smeđa.

That's grass.

Ono je trava.

This is grass.

Ovo je trava.

It's green.

Ona je zelena.

This is a flower.

Ovo je cvijet.

It's red.

On je crven.

This is yellow.

Ovo je žuta.

That flower is blue.

Taj cvijet je plav.

That flower is red.

Taj cvijet je crven.

That flower is yellow.

Taj cvijet je žut.

That's not blue. It isn't blue.

To nije plava.