The hex color #155bff is a dark color. The web-safe version is Hex
#0066FF. A complementary color is
#EAA400. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#488EFF, and Hex
#0028CC is the 20% darker color. If the color is saturated by 10%, you get
#0B58FF. If the color is desaturated by 10%, the color
#1F5EF2 is obtained.