The hex color #0f15a2 is a dark color. The web-safe version is Hex
#000099. A complementary color is
#F0EA5D. The grayscale version is
#424242. A 20% lighter version of the original color is
#4248D5, and Hex
#00006F is the 20% darker color. If the color is saturated by 10%, you get
#0A11AC. If the color is desaturated by 10%, the color
#141A98 is obtained.