The hex color #1d38f4 is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#E2C70B. The grayscale version is
#6E6E6E. A 20% lighter version of the original color is
#506BFF, and Hex
#0005C1 is the 20% darker color. If the color is saturated by 10%, you get
#1533FF. If the color is desaturated by 10%, the color
#253DE7 is obtained.