The hex color #374efc is a dark color. The web-safe version is Hex
#3366FF. A complementary color is
#C8B103. The grayscale version is
#808080. A 20% lighter version of the original color is
#6A81FF, and Hex
#041BC9 is the 20% darker color. If the color is saturated by 10%, you get
#3049FF. If the color is desaturated by 10%, the color
#3E53F0 is obtained.