.mydiv { filter: grayscale(50%) }
/* Graut alle Bilder um 50% aus und macht sie um 10px unscharf */
img {
filter: grayscale(0.5) blur(10px);
}
brightness(0%) /* Completely black */
brightness(0.4) /* 40% brightness */
brightness(1) /* No effect */
brightness(200%) /* Double brightness */