The hex color #2154c5 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#DEAB3A. The grayscale version is
#696969. A 20% lighter version of the original color is
#5487F8, and Hex
#002192 is the 20% darker color. If the color is saturated by 10%, you get
#1A52CE. If the color is desaturated by 10%, the color
#2856BC is obtained.