The hex color #3d03d7 is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#C2FC28. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#7036FF, 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
#400CCB is obtained.