Esa diadema azul combina bien con tu vestido.

That blue headband goes well with your dress.

Breakdown of Esa diadema azul combina bien con tu vestido.

• el vestido: the dress
• tu: your
• azul: blue
• esa: that

Questions & Answers about Esa diadema azul combina bien con tu vestido.

Why is it esa and not esta or aquella?

Spanish has three common demonstratives:

• esta = this
• esa = that
• aquella = that over there / that more distant one

Here, esa diadema means that headband.
A native speaker might choose esa because the item is closer to the listener, not especially close to the speaker, or simply because it has already been identified in the conversation.

So:

• esta diadema = this headband
• esa diadema = that headband
• aquella diadema = that headband over there

Also, esa has to agree with diadema, which is feminine singular.

What does diadema mean in Spain?

In everyday Spanish from Spain, diadema usually means a headband or hairband worn on the head.

In more formal or literary contexts, it can also mean a diadem or tiara, but in a sentence about matching clothes, most learners should understand it as headband.

Why is the verb combina and not combinas or combinan?