The hex color #155cee is a dark color. The web-safe version is Hex
#0066FF. A complementary color is
#EAA311. The grayscale version is
#757575. A 20% lighter version of the original color is
#488FFF, and Hex
#0029BB is the 20% darker color. If the color is saturated by 10%, you get
#0B5AFA. If the color is desaturated by 10%, the color
#1F5FE2 is obtained.