How do you say red in spanish?

There are four ways to say 'red' in Spanish; feminine singular, feminine plural, masculine singular, masculine plural, examples of which follow.

Red ant = hormiga roja (f.s.)

red ants = hormigas rojas (f.p.)

red dog = perro rojo (m.s.)

red dogs = perros rojos (m.p)

ALL the Words in bold type mean 'red.'