Narančasta jakna visi na stolici kraj vrata.

Because the adjective has to agree with the noun in gender, number, and case.

• jakna = jacket
• It is feminine singular
• The subject here is in the nominative

So the adjective must also be feminine singular nominative:

• masculine: narančasti
• feminine: narančasta
• neuter: narančasto

That is why narančasta jakna is correct.

Jakna is the subject of the sentence, so it is in the nominative singular.

The basic dictionary form is jakna, and that same form is used here because the sentence is saying what the jacket is doing:

• Narančasta jakna = The orange jacket
• visi = is hanging / hangs

So jakna stays in the nominative.

Visi is the 3rd person singular present tense of visjeti, which means to hang.

So:

• jakna visi = the jacket is hanging

In English, you often say is hanging, but Croatian uses a simple present form here: visi.

It can sound like either:

• hangs
• is hanging

depending on context.

Because visi already means hangs / is hanging.

In English, is is part of the progressive form is hanging, but Croatian does not build this idea the same way. The verb itself carries the meaning.

So:

• English: The jacket is hanging
• Croatian: Jakna visi

There is no need for a separate verb like is here.

Because after na when it means location (on, at), Croatian uses the locative case.

• stolica = chair (basic form, nominative)
• locative singular = stolici

So:

• na stolici = on the chair

This is a very common pattern:

• na stolu = on the table
• na zidu = on the wall
• na stolici = on the chair

If na expresses movement toward something, it usually takes the accusative instead. But here the jacket is already there, so it is location, not movement.

Na usually means on or at, depending on context.

Here it marks the place where the jacket is hanging:

• visi na stolici = is hanging on the chair

That matches English pretty closely in this sentence. Croatian uses na with many surfaces and positions where something is located.

Kraj here means by, beside, or next to.

It is followed by the genitive case.

The noun vrata is a special word in Croatian:

• it means door
• but it has a plural form in grammar, even when referring to a single door

So:

• dictionary form: vrata
• after kraj, the genitive form is also vrata

That is why you get:

• kraj vrata = by the door / beside the door

This is one of those things English speakers often just have to get used to.

Yes. In Croatian, vrata is normally used for a door even though grammatically it behaves like a plural-only noun.

This is similar to how some nouns in other languages look plural but can refer to one object.

So in everyday Croatian:

• vrata su otvorena = the door is open
• literally, the grammar looks plural, but the meaning is often singular in English

In your sentence, kraj vrata simply means by the door.

Yes. Pored vrata is also very natural and means almost the same thing: next to / beside the door.

A few notes:

• kraj vrata = by / beside the door
• pored vrata = next to / beside the door

Both are common. In many contexts, they are interchangeable.

Yes, Croatian word order is more flexible than English word order because case endings show what each word is doing.

The neutral, natural order here is:

• Narančasta jakna visi na stolici kraj vrata.

But other orders are possible for emphasis, for example:

• Na stolici kraj vrata visi narančasta jakna.
  • This emphasizes the location first.

The original version sounds like a normal descriptive sentence. English is much stricter about word order, but Croatian can move things around more easily.

Because Croatian has no articles like English the and a/an.

So:

• jakna can mean a jacket or the jacket
• the exact meaning depends on context

In this sentence, English naturally uses the:

• The orange jacket is hanging on the chair by the door.

But Croatian simply says:

• Narančasta jakna visi na stolici kraj vrata.

In this sentence, narančasta is an adjective meaning orange.

It agrees with jakna:

• narančasta jakna = orange jacket

Croatian color words often behave like regular adjectives, so they change their endings to match the noun.

For example:

• narančasti kaput = orange coat
• narančasta jakna = orange jacket
• narančasto svjetlo = orange light

Yes, sometimes.

The core meaning of visjeti is to hang, but in real usage it can describe something suspended, draped, or hanging loosely in place.

So with clothing, jakna visi na stolici can mean the jacket is hanging over the chair, draped on it, or left there in a hanging way. It does not always have to mean it is hanging from a hanger or hook.

That is why the sentence sounds natural.