The hex color #343ADA is a dark color. The web-safe version is Hex
#3333CC. A complementary color is
#CBC525. The grayscale version is
#6D6D6D. A 20% lighter version of the original color is
#676DFF, and Hex
#0107A7 is the 20% darker color. If the color is saturated by 10%, you get
#2E35E5. If the color is desaturated by 10%, the color
#3A3FCF is obtained.