The hex color #155fc5 is a dark color. The web-safe version is Hex
#0066CC. A complementary color is
#EAA03A. The grayscale version is
#686868. A 20% lighter version of the original color is
#4892F8, and Hex
#002C92 is the 20% darker color. If the color is saturated by 10%, you get
#0D5ECE. If the color is desaturated by 10%, the color
#1D60BC is obtained.