The hex color #a91fe8 is a dark color. The web-safe version is Hex
#9933FF. A complementary color is
#56E017. The grayscale version is
#909090. A 20% lighter version of the original color is
#DC52FF, and Hex
#7600B5 is the 20% darker color. If the color is saturated by 10%, you get
#AC14F1. If the color is desaturated by 10%, the color
#A72ADF is obtained.