Here's a breakdown:
* Estudiante: Student (masculine or feminine)
* es: is (verb "ser" in the third person singular)
* rubia: blonde (feminine adjective)
This phrase is grammatically correct, but it's important to note that:
* It assumes the student is female. Spanish uses gendered adjectives, so "rubia" is specifically for women. If the student were male, you would use "rubio."
* It uses a simple adjective to describe the student's hair color. You could also use more descriptive phrases like "tiene el pelo rubio" (has blonde hair) or "su pelo es rubio" (her hair is blonde).
Hope this helps!