The hex color #1f28ef is a dark color. The web-safe version is Hex
#3333FF. A complementary color is
#E0D710. The grayscale version is
#676767. A 20% lighter version of the original color is
#525BFF, and Hex
#0000BC is the 20% darker color. If the color is saturated by 10%, you get
#1822FD. If the color is desaturated by 10%, the color
#262EE1 is obtained.