There are two types of adjectives: variable and invariable.
The variable adjectives have two forms: masculine or feminine, depending on the noun.
As a general rule, the most of the adjectives ended in a,e, i, l, s or z are invariable, for example:
- El hombre amable
- La mujer amable
Some colors are variables (blanco, negro, rojo, amarillo, morado...) and others are invariables (azul, verde, rosa...)
Examples:
- el coche rojo y la casa roja
- el coche verde y la casa verde