The hex color #155df9 is a dark color. The web-safe version is Hex
#0066FF. A complementary color is
#EAA206. The grayscale version is
#797979. A 20% lighter version of the original color is
#4890FF, and Hex
#002AC6 is the 20% darker color. If the color is saturated by 10%, you get
#0B5AFF. If the color is desaturated by 10%, the color
#1F60EC is obtained.