The hex color #3b45af is a dark color. The web-safe version is Hex
#333399. A complementary color is
#C4BA50. The grayscale version is
#656565. A 20% lighter version of the original color is
#6E78E2, and Hex
#08127C is the 20% darker color. If the color is saturated by 10%, you get
#3742B6. If the color is desaturated by 10%, the color
#3F48A8 is obtained.