Theory:Red

Red is used prominently.

It is believed that the color red has significance in the show Heroes. Though highly suspect, examples of its usage are categorized here.

Fan Theories

• The use of the color red is sprinkled throughout the series in a very similar fashion to the way it was used in the movie The Sixth Sense. In the movie, each scene containing red indicated the scene contained a ghost.
• Because of the comic book inspirations and influences on Heroes, the use of the color red may be attributed to Frank Miller's series (which was later made into a Hollywood movie), Sin City. The world of the series is black and white (referred to as "ashcans" in the publishing circles) except for a bright single shade of deep red, used to color blood, lipstick, a woman's dress, etc. In many of Isaac's paintings he uses duller drab earth-tones, accented by bright vivid reds.
• Because Heroes deals with comic-book-like scenarios, there may be more appearances of the primary colors in the show, as it was in the movie Dick Tracy.

Examples

• School colors at Union Wells (lockers, signs, varsity jackets, football uniforms) (most common school color in the USA, since red is a national color)
  • Claire's cheerleader uniform
  • Brody's jacket
  • Claire's hooded shirt in "Genesis"
• Nathan's political campaign (Red and blue are standard colors in USA politics)
  • Nathan's campaign signs
  • Nathan's tie

• People
  • Charlie's hair and apron (especially when depicted by Isaac)
  • Elisa Thayer's, aka the Red Haired Agent's blazingly red hair.

• Clothing
  • Peter's hooded sweatshirt in "Genesis"
  • Hiro's shirt when he teleports to Times Square
  • The Japanese schoolgirl's red bows
  • Mohinder's mother's sari (Red is a common color in Indian clothing)
  • The sash on Mira's sari (Red is a common color in Indian clothing)
  • Niki's blouse
  • Micah's shirt
  • Charles Deveaux's pajamas
  • Lori's outfit
  • Hiro wearing red among the rank and file white collar workers, after he teleported to Yamagato Industries.
  • Simone's Scarf

• Objects
  • The tape on teleportation
  • Simone's umbrella when kissed by Peter in the rain
  • Isaac's painting of the boiling water
  • The title of Hiro's 9th Wonders! comic book
  • The curtains behind Niki in her video
  • Matt's radiation detector badge when interviewing Ted (Red/green is safety standard in USA)
  • The numbers on the clock when Hiro teleports from the subway (LCD displays use diodes that emit in the red spectrum, industry standard)
  • The stop sign when Peter punches Nathan (who is wearing a red tie) (In the USA, all stop signs are red)
  • The stapler Lyle uses on Claire in "Nothing to Hide"
  • The lettering and clock at the Burnt Toast Diner
  • The candles at Charlie's memorial at the BTD

• Blood (Hemoglobin gives human blood its red color)
  • Blood in the Isaac's painting (especially Peter's depiction of Jackie getting debrained)
  • The bloody footprints Hiro finds (in "Don't Look Back") in Isaac's apartment where Isaac was murdered

Gallery

• 
  Niki's scarlet background curtains
• 
  Hiro stands out in red
• 
  A red misfit among black and white workers
• 
  Claire's red cheerleading uniform.
• 
  Isaac paints vibrant red flames
• 
  Black, white, and red
• 
  A red background
• 
  Poignant red blood on a Homecoming banner
• 
  Red blood stands out
• 
  Red on top of muted colors
• 
  Red among the shadows
• 
  Peter's red shirt stands out
• 
  Red in Charlie's memorial