The hex color #2003f3 is a dark color. The web-safe version is Hex
#3300FF. A complementary color is
#DFFC0C. The grayscale version is
#5D5D5D. A 20% lighter version of the original color is
#5336FF, and Hex
#0000C0 is the 20% darker color. If the color is saturated by 10%, you get
#1A00FF. If the color is desaturated by 10%, the color
#260CE4 is obtained.