Canon EOS Rebel T5i 18-55mm IS STM Lens Kit - Manual (Page 80)

Shoot by Ambience Selection
80
Brighter
The picture will look brighter.
Darker
The picture will look darker.
Monochrome
The picture will be monochrome. You can select the monochrome
color to be black and white, sepia, or blue. When [Monochrome] is
selected, <0> will appear in the viewfinder.
COP
Y