The hex color #3d19bc is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#C2E643. The grayscale version is
#5B5B5B. A 20% lighter version of the original color is
#704CEF, and Hex
#0A0089 is the 20% darker color. If the color is saturated by 10%, you get
#3A12C6. If the color is desaturated by 10%, the color
#4020B2 is obtained.