grayscale(100%)
Takes out the colors
sepia(100%)
Makes colors brown
hue-rotate(180deg)
Turns the color wheel
invert(100%)
Inverts the colors
brightness(50%)
Adds brightness
contrast(150%)
Makes darks darker and brights brighter
blur(5px)
Blurs the element
saturate(180%)
Makes colors brighter
drop-shadow(0px 5px 10px black)
Adds a drop shadow
opacity(0.5)
Makes the element transparent