The hex color #155C9F is a dark color. The web-safe version is Hex
#006699. A complementary color is
#EAA360. The grayscale version is
#5B5B5B. A 20% lighter version of the original color is
#488FD2, and Hex
#00296C is the 20% darker color. If the color is saturated by 10%, you get
#0E5CA6. If the color is desaturated by 10%, the color
#1C5C98 is obtained.