A young hunter on his first hunt is wearing hunting pink (the "red" coloured tunic). A junior hunter would always be wearing a black tunic until they became respected and senior enough to be granted the privilege of wearing "hunting pink".
A character refers to the hunters wearing "red". The red colour traditionally worn by hunters in the UK is known as "hunting pink" and never referred to as "red".
At the start of the film when the husband walks into the sitting room of his house he can be seen switching the light on complete with audio sound effect, but if you look closely he doesn't actually press the switch and it doesn't change position yet the light still comes on anyway.