The hex color #3d00d7 is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#C2FF28. The grayscale version is
#5C5C5C. A 20% lighter version of the original color is
#7033FF, and Hex
#0A00A4 is the 20% darker color. If the color is saturated by 10%, you get
#3A00E3. If the color is desaturated by 10%, the color
#4009CB is obtained.