The hex color #1a33d3 is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#E5CC2C. The grayscale version is
#606060. A 20% lighter version of the original color is
#4D66FF, and Hex
#0000A0 is the 20% darker color. If the color is saturated by 10%, you get
#132FDF. If the color is desaturated by 10%, the color
#2138C8 is obtained.