The hex color #155cf7 is a dark color. The web-safe version is Hex
#0066FF. A complementary color is
#EAA308. The grayscale version is
#787878. A 20% lighter version of the original color is
#488FFF, and Hex
#0029C4 is the 20% darker color. If the color is saturated by 10%, you get
#0B59FF. If the color is desaturated by 10%, the color
#1F5FEA is obtained.