The hex color #6670df is a dark color. The web-safe version is Hex
#6666CC. A complementary color is
#998F20. The grayscale version is
#929292. A 20% lighter version of the original color is
#99A3FF, and Hex
#333DAC is the 20% darker color. If the color is saturated by 10%, you get
#626DE7. If the color is desaturated by 10%, the color
#6A73D7 is obtained.