The hex color #155ab3 is a dark color. The web-safe version is Hex
#0066CC. A complementary color is
#EAA54C. The grayscale version is
#616161. A 20% lighter version of the original color is
#488DE6, and Hex
#002780 is the 20% darker color. If the color is saturated by 10%, you get
#0D59BB. If the color is desaturated by 10%, the color
#1D5BAB is obtained.