This is the 9250th most frequent Catalan word.
groga
"Groga" means "yellow" in English.
In this sentence, 'groga' is an adjective describing the noun 'carpeta' (folder), agreeing in gender and number (feminine singular).
La carpeta groga està sobre la taula.
The yellow folder is on the table.
Here, 'groga' again acts as an adjective modifying 'llimona' (lemon), which is a feminine singular noun.
Ahir vaig comprar una llimona groga.
Yesterday I bought a yellow lemon.
'Groga' describes 'llum' (light), which is feminine singular, adhering to adjective agreement rules in Catalan.