Learn Portuguese (Portugal): O vestido é roxo.

In Portuguese, grammatical gender belongs to the word itself, not to who uses the object. Words ending in -o are usually masculine, so vestido is masculine regardless of its meaning.

Why do we use é here instead of está? Both mean "is".

The verb ser (é) is used for permanent or defining characteristics. Since the color of the dress is a permanent feature and not a temporary state, we use é instead of está.

Does the word roxo change depending on the clothing item?

Yes! Adjectives must match the gender of the noun they describe. Because vestido is masculine, we use roxo. If we were talking about a feminine noun like a skirt (a saia), it would change to roxa.

How do you pronounce the x in roxo?

In this word, the x makes a "sh" sound, just like in the English word "shoe". The first "o" is open and the final "o" sounds like "oo", so the whole word sounds roughly like "roh-shoo".