The hex color #0f39a0 is a dark color. The web-safe version is Hex
#003399. A complementary color is
#F0C65F. The grayscale version is
#4D4D4D. A 20% lighter version of the original color is
#426CD3, and Hex
#00066D is the 20% darker color. If the color is saturated by 10%, you get
#0937A8. If the color is desaturated by 10%, the color
#153B98 is obtained.