The hex color #6121cf is a dark color. The web-safe version is Hex
#6633CC. A complementary color is
#9EDE30. The grayscale version is
#707070. A 20% lighter version of the original color is
#9454FF, and Hex
#2E009C is the 20% darker color. If the color is saturated by 10%, you get
#5F19D8. If the color is desaturated by 10%, the color
#6329C6 is obtained.