Because occasionally it's colored red. Simple as that.
Red. Lisa says in an episode "I feel like I've been wearing this same red dress forever."
red
yes
can you wear red evening shoes with black stockings and a black dress
blue dress with sparkles
only red, black or white
A man should wear red dress shoes with a black or white suit as long as he can pull it off.
an orange or red dress
She wore a red dress in her wedding with Rufus.
Red lipstick, Red dress, Red shoes, or red rubies
red
it is a long red dress