Brief re-cap on conventions of film noirs..

In a traditional film noir you'll find something that goes like this..

Narrative

• Seduction
• Tragedy
• Crime
• Violence
• Melodramatic

Characters

• Femme Fatale
• Antagonist
• Protagonist - Law Enforcement

Mise-en-Scene

• Chiarascuro - Contrast between dark and light
• Monochrome - Different shades of one colour

Costumes

• Seductive
• Period Costumes
• Suits

Location

• Urban
• Bars
• Casinos
• Dystopian looking surrounding

Sound

• Orchestral
• Classical
• Jazz
• Heightened sound effects

Editing

• Generally simple
• Sense of realism
• Verisimilitude
• Slow pace
• Suspence/Tension