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We all know that making hit movies costs a huge amount of money. But what we don't tend to think about is that getting people to come to a movie, with trailers and posters, is often just as expensive.

A studio might spend as much as it cost to actually make a blockbuster film again on marketing it - sometimes hundreds of millions of dollars.

It鈥檚 vital then the posters they design manage to convince us to go out and buy a ticket. The problem for the studios is that we might only glance at a movie poster for a few seconds, but in that time it has to tell us what kind of movie it is, what makes it special and why we have to see it.

Film journalist and critic Adam Smith tells us of some of the tricks studios have up their sleeves to make sure the posters do just that.

Use blue on black for action

Star Wars Avengers
Image caption,
Avengers: Endgame and Star Wars

Think about bags of crisps. Red means ready salted, right? Green, very likely to be cheese and onion. Blue, the all-time classic, salt and vinegar. You don鈥檛 really need to see much more than the colour of the pack to immediately know what鈥檚 inside.

The designers of movie posters use the same secret colour codes for movies. Blue on a black background is the go-to colour scheme for action movies, usually with a vivid splash of orange in the form of fire.

The colour schemes used on the posters for Star Wars and Avengers: Endgame are incredibly similar, despite the movies being made over 40 years apart (as is the way the characters, and gunfire, are arranged, more on that next).

Without reading anything on the poster, the colours alone tell you what kind of film to expect.

Star Wars Avengers
Image caption,
Avengers: Endgame and Star Wars

Mirror another hit movie poster鈥檚 composition

Brokeback Mountain Titanic
Image caption,
Titanic and Brokeback Mountain

If a poster has worked for one movie you can see subsequent ones 鈥榖orrow鈥 elements of it to try to subliminally convince people that liked the first to try the second.

Take the above posters for James Cameron鈥檚 smash hit Titanic and James Schamus鈥檚 Brokeback Mountain. You can immediately see the similarities in the composition (the way the different objects are arranged on the poster), which is probably not a coincidence. The characters鈥 heads are in the same position, both on the posters (at the top) and in relation to each other (one bowed in profile and the other looking down but facing us).

The title of the film is in the same place, both use clouds and soft light and the muted, washed-out blue colour schemes are similar (which implies heritage and period, both movies are set in the past).

The effect is to secretly say: 鈥淚f you liked that historical, tear-jerking story about a doomed love affair, you might like this one as well.鈥

Brokeback Mountain Titanic
Image caption,
Titanic and Brokeback Mountain

Yellow means indie

Little Miss Sunshine Kill Bill
Image caption,
Little Miss Sunshine and Kill Bill

Smaller films have to quickly catch the attention of indie movie fans amidst the hubbub of the marketing campaigns for the gargantuan blockbusters. So designers have set upon using yellow as a secret 鈥榗ode鈥 colour for indie movies.

Quentin Tarantino鈥檚 violent revenge fantasy Kill Bill, family comedy Little Miss Sunshine and racing documentary Senna couldn鈥檛 be more different in terms of their subject matter.

But they were all indie movies, trying to attract an audience interested in smaller films rather than the big blockbusters. The bold, unmissable use of yellow makes the poster stand out, and communicates the kind of audience it鈥檚 intended for, without them having to even read the title.

Little Miss Sunshine Kill Bill
Image caption,
Little Miss Sunshine and Kill Bill

The tagline

Alien Erin Brockovich
Image caption,
Alien and Erin Brockovich

The tagline is the short sentence that sums up the film and tries to convince you that you need to see it. These are the only words a poster has to communicate a vast amount of information.

Taglines are an art-from all of their own and copywriters spend a great deal of time honing them to perfection. Some become famous, like Jaws 2鈥檚: 鈥淛ust when you thought it was safe to go back in the water.鈥

Some taglines work by asking an intriguing 鈥榠nvisible鈥 question, one that only seeing the movie can answer. Take Ridley Scott鈥檚 Alien and its all-time classic tagline: 鈥淚n space no-one can hear you scream.鈥 The word 鈥渟cream鈥 indicates a scary movie, but why would you be screaming? You鈥檒l have to go and see the movie to find out.

Others try to sum up the whole message or mood of the movie. Erin Brockovich鈥檚 鈥淪he brought a small town to its feet and a huge company to its knees鈥 gets a huge amount of information about the film into just 15 words.

Taglines are the only words a movie poster has, so they have to say a lot. They need to work hard and fast.

Alien Erin Brockovich
Image caption,
Alien and Erin Brockovich

Red, black and a white background means comedy

The Death of Stalin The Spy Next Door
Image caption,
The Death of Stalin and The Spy Next Door

Quickly communicating a film is a comedy is a tricky thing to do. A gun in a poster image says it鈥檚 a thriller or action movie. Blood or a vampire鈥檚 teeth that it鈥檚 a horror movie. But there鈥檚 no single object or clue that you can put in a poster to scream 鈥渇unny!鈥.

That鈥檚 why movie poster designers very often use the code of bold red and black on a white background to sell the idea that a film is a comedy. Red is a colour often associated with comedy (think Red Nose Day) while, according to movie poster designer James Verdesoto, the white background focuses the attention on the characters, the source of the humour in a comedy film.

As mentioned earlier, it鈥檚 a colour scheme that鈥檚 become embedded in moviegoers minds as deeply as 鈥済reen is for cheese and onion.鈥

The Death of Stalin The Spy Next Door
Image caption,
The Death of Stalin and The Spy Next Door

Harness the power of nothing

Ant-Man Poltergeist
Image caption,
Ant-Man and Poltergeist

You鈥檇 think that any movie poster designer would want to make the image as big as possible for maximum impact. But in fact sometimes reducing the size of the main image and surrounding it with a lot of nothing (negative space is the designers鈥 term) can really draw your eye to what the designer wants you to see. It鈥檚 often used as way to make you think about the theme of the movie.

Saul Bass was one of the great graphic designers of the 20th century and his poster for 1955鈥檚 Anatomy Of A Murder uses negative space to draw the eye to his clever design of the title of the film. The poster for classic horror film Poltergeist puts little Heather O鈥橰ourke in a sea of darkness. What could be lurking there?

But the record for using negative space must go to Marvel鈥檚 Ant Man. When you do see the tiny image it might make you smile. Tiny things can make a big impact, which is, of course, the point of the film.

Ant-Man Poltergeist
Image caption,
Ant-Man and Poltergeist

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