The hex color #0b51eb is a dark color. The web-safe version is Hex
#0066FF. A complementary color is
#F4AE14. The grayscale version is
#6D6D6D. A 20% lighter version of the original color is
#3E84FF, and Hex
#001EB8 is the 20% darker color. If the color is saturated by 10%, you get
#014EF8. If the color is desaturated by 10%, the color
#1554DE is obtained.