How to Say "yellow" in Spanish
The Spanish word for “yellow” is “amarillo” — A1 level. This is a very common word in everyday Spanish.

Examples
Compré una flor amarilla para mi madre.
I bought a yellow flower for my mother.
Todos los taxis en Nueva York son amarillos.
All the taxis in New York are yellow.
Después de la enfermedad, se quedó un poco amarillo.
After the illness, he looked a little pale (yellowish).
Making it Match
As an adjective, 'amarillo' must change its ending to match the thing it describes in number (singular/plural) and gender (masculine/feminine): 'amarillo' (masc. sing.), 'amarilla' (fem. sing.), 'amarillos' (masc. plural), 'amarillas' (fem. plural).
Forgetting Gender Agreement
Mistake: “La casa es amarillo.”
Correction: La casa es amarilla. (Since 'casa' is feminine, the adjective must end in -a.)
Other Meanings of “amarillo”
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