Conventions of horror slasher genre

A slasher film is a sub-genre of the horror film genre typically involving a psychopathic killer stalking and killing a sequence of victims in a graphically violent manner, often with a cutting tool such as a chainsaw. 

Setting
Usually set in isolated areas where there is no help for the characters and no hope of finding somewhere to run. There is also the use of pathetic fallacy which consists of thunder and rain used to enhance on the use of isolation. Also, usually, the scary, sinister scenes are set at night because it's dark and the dark connotes evil. 

Props
The main props used are the killer's weapons e.g. knifes, hammers, axes, chainsaws, saws, rope, cable ties, chokers, plastic bags etc... Also, there can be antiques and paintings which are a big prop used to create a dark and sinister scene. 

Colour scheme 
Colours used within horror films are usually reds or blacks because they connote danger, and death. The background colours are usually black with hints of dark red at times. The colours can also be pale (sometimes) e.g. twilight has a lot of elements of pale colouring of the scenes; the reason for that film to use pale colouring is because of the slight genre of horror that is in that film (vampires are usually pale and they drink blood which therefore connotes a horror genre). The colour red connotes blood majorly; the genre of horror expects to see a lot of blood so that is why the colour red is used for a lot of things e.g. font or colour/special effects. 

Characters
For characters, there is the blonde (normally the 'scream queen') who is busty, blond and wearing revealing clothing. Then there is the killer who is normally a man wearing all black, no colour, black leather boots, holding props such as knifes, hammers, chainsaws or axes etc... The killer's face won't usually be shown. in some cases the killer may be female e.g. in Jennifer's body. 

Lighting
Lighting is used in horror films to give the effect of something bad is about to happen for example shadows and light flickering makes the audience feel scared and nervous. As well as this, lighting can be used to give the mood in horror films, usually when some one is scared its quite dark and is usually raining outside. It can also be used to create a personality of a character by casting shadows across there face to create a sinister minded character or a split personality of a character. So, the lighting is usually low key and dark.

Titles

The font of the titles is usually the colour white or red on a black, dark background to create a contrast, like the contrast between good and evil. Horror fonts can also be serif or in upper case. The three main colours the titles usually will be are white, black or red to connote the sinister, bloody, gory, dark nature of the film (the horror genre).