Rubia

Rubia
 

She is blond/blonde :?:

Thanks. :)

She is blonde. She is a blonde. An adjective and noun stolen from French, retaining the feminine ending.:)

The boys at Random House (Unabridged) say this,

The spelling BLONDE is still widely used for the noun that specifies a woman or girl with fair hair: The blonde with the baby in her arms is my anthropology professor. Some people object to this as an unnecessary distinction, preferring BLOND for all persons: My sister is thinking of becoming a blond for a while. As an adjective, the word is more usually spelled BLOND in reference to either sex (an energetic blond girl; two blond sons), although the form BLONDE is occasionally still used of a female: the blonde model and her escort. The spelling BLOND is almost always used for the adjective describing hair, complexion, etc.: His daughter has blond hair and hazel eyes.

(By the by, the other day I read some jokes by blonds about brunettes and red-haired... but that's a horse o another hue...)

I suppose they are the same people who use actor instead of the correct word actress. I feel sorry for their sexual issues.

Same here... (Reverte had one last "Patente de Corso" on the same subject, just last Sunday...)

I understand that I can use both when writing formally, can't I?

Yes. As a noun I would use blonde when it means female with blond hair.
Example: Marilyn Monroe was a beautiful blonde.

Thanks. I want to write: "She is blond/blonde, but not stupid". This is an example of a kind of sentence in my notes (very formal, by the way). :)

Both are correct, but when referring to a female I personally would use blonde. When referring to hair with no particular gender I would use blond. When referring to a man I would use blond.

OK, thanks everybody. :)