The hex color #4203D3 is a dark color. The web-safe version is Hex
#3300CC. A complementary color is
#BDFC2C. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#7536FF, and Hex
#0F00A0 is the 20% darker color. If the color is saturated by 10%, you get
#3F00DF. If the color is desaturated by 10%, the color
#450CC7 is obtained.