The hex color #1d29e3 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E2D61C. The grayscale version is
#636363. A 20% lighter version of the original color is
#505CFF, and Hex
#0000B0 is the 20% darker color. If the color is saturated by 10%, you get
#1623F0. If the color is desaturated by 10%, the color
#242FD6 is obtained.