The hex color #0866ea is a dark color. The web-safe version is Hex
#0066FF. A complementary color is
#F79915. The grayscale version is
#737373. A 20% lighter version of the original color is
#3B99FF, and Hex
#0033B7 is the 20% darker color. If the color is saturated by 10%, you get
#0065F6. If the color is desaturated by 10%, the color
#1367DE is obtained.