The hex color #3d12c8 is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#C2ED37. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#7045FB, and Hex
#0A0095 is the 20% darker color. If the color is saturated by 10%, you get
#3A0BD3. If the color is desaturated by 10%, the color
#401ABD is obtained.