The hex color #3b4ece is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#C4B131. The grayscale version is
#727272. A 20% lighter version of the original color is
#6E81FF, and Hex
#081B9B is the 20% darker color. If the color is saturated by 10%, you get
#354AD7. If the color is desaturated by 10%, the color
#4152C5 is obtained.