The hex color #1d1fe2 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E2E01D. The grayscale version is
#5F5F5F. A 20% lighter version of the original color is
#5052FF, and Hex
#0000AF is the 20% darker color. If the color is saturated by 10%, you get
#1619EF. If the color is desaturated by 10%, the color
#2425D5 is obtained.