Y is for... Yellow filter effect

Your EOS DSLR's picture styles include a Monochrome option that enables you to simulate the colour filters you might use when shooting black-and-white photography: Yellow, Orange Red and Green. Yellow produces more natural blue skies and crisper white clouds: Orange gives a slightly darker blue sky and more brilliant sunsets: Red darkens dark blue sky and gives crisper and brighter autumnal leaves: and Green produces fine skin tones, plus foliage that will look crisper and brighter. You can increase the contrast of a filter for even stronger effects.