Las mechas rubias le quedan bien, aunque ella prefiere un color más discreto.

In this context, las mechas means highlights or streaks in the hair.
So las mechas rubias means the blonde highlights.

A learner might expect rubias to mean blonde women, and it can mean that in other contexts, but here it is just the adjective blonde agreeing with mechas.

Rubias agrees with mechas, which is:

• feminine
• plural

So the adjective must also be feminine plural: rubias.

Agreement pattern:

• la mecha rubia = the blonde highlight
• las mechas rubias = the blonde highlights

As for word order, in Spanish the adjective usually comes after the noun, so mechas rubias is the normal order.

Quedar bien is a very common expression meaning:

• to suit someone
• to look good on someone

So Las mechas rubias le quedan bien means that blonde highlights suit her or look good on her.

This is more natural in Spanish than translating word-for-word from English.

It is le because quedar bien uses an indirect object pronoun for the person affected:

• Le queda bien = It suits her/him
• Les queda bien = It suits them/you all

So in this structure:

• the thing that looks good = las mechas rubias
• the person it looks good on = le

Using la would not be correct here.

Because the subject is las mechas rubias, which is plural.

The verb quedar agrees with the thing that suits the person, not with le.

So:

• La falda le queda bien = The skirt suits her.
• Las mechas rubias le quedan bien = The blonde highlights suit her.

Because bien is an adverb, and it modifies the verb phrase quedar bien.

This expression works as a fixed idea:

• quedar bien = to look good / to suit
• quedar mal = to look bad / not suit

You would not say le quedan buenas here.

Aunque means although, even though, or sometimes though.

It introduces a contrast:

• Las mechas rubias le quedan bien = Blonde highlights suit her
• aunque ella prefiere un color más discreto = although she prefers a more subtle colour

So the idea is: they look good on her, but that is not necessarily what she wants.

After aunque, Spanish can use either the indicative or the subjunctive, depending on meaning.

Here, prefiere is indicative because the speaker presents it as a real fact:

• aunque ella prefiere... = although she does prefer...

If the speaker were talking about something uncertain, hypothetical, or not confirmed, the subjunctive could appear in other contexts.

Yes, you could say:

• Las mechas rubias le quedan bien, aunque prefiere un color más discreto.

Spanish often leaves out subject pronouns because the verb ending already shows the subject.

Here, ella is included for emphasis or clarity, especially to highlight the contrast:

• the highlights suit her,
• but she prefers something more subtle.

So ella is optional, but meaningful.

Here discreto means:

• subtle
• understated
• not too noticeable

So un color más discreto means a hair colour that is less striking or less flashy.

It does not mean discreet in the English sense of good at keeping secrets. In Spanish, discreto often refers to something modest, restrained, or not very showy.

Spanish often uses broad, natural wording where English might be more specific.

Un color más discreto simply means a more subtle colour/shade, and it sounds normal in the context of hair.

Other expressions are possible, depending on nuance:

• un tono más discreto = a more subtle tone/shade
• unas mechas más discretas = subtler highlights
• un color menos llamativo = a less eye-catching colour

But un color más discreto is perfectly natural.

It is very common in Spain to use mechas for hair highlights.

In other Spanish-speaking countries, people may also use mechas, but there can be regional alternatives or slightly different usage. For a learner focusing on Spain Spanish, mechas is absolutely a useful and natural word.

Yes, depending on context, rubio/rubia can sometimes refer to a light blonde or golden shade rather than a strict English category.

With hair, though, rubias will usually be understood as blonde highlights.

A natural English version could be:

• Blonde highlights suit her, although she prefers a more subtle colour.
• Blonde highlights look good on her, though she prefers a subtler colour.

These are better than a very literal translation because quedar bien is usually best translated idiomatically.

A few important ones:

1. Noun + adjective agreement

   • las mechas rubias
   • feminine plural noun + feminine plural adjective

2. The verb agrees with the subject

   • Las mechas rubias le quedan bien
   • quedan is plural because las mechas rubias is plural

3. Indirect object pronoun with quedar bien

   • le = to her

4. Contrast with aunque

   • aunque ella prefiere...

5. Comparative structure

   • más discreto = more subtle

It is a short sentence, but it contains several very useful everyday patterns.