The hex color #2e66f3 is a dark color. The web-safe version is Hex
#3366FF. A complementary color is
#D1990C. The grayscale version is
#828282. A 20% lighter version of the original color is
#6199FF, and Hex
#0033C0 is the 20% darker color. If the color is saturated by 10%, you get
#2663FE. If the color is desaturated by 10%, the color
#3669E8 is obtained.