The hex color #a837f1 is a dark color. The web-safe version is Hex
#9933FF. A complementary color is
#57C80E. The grayscale version is
#9B9B9B. A 20% lighter version of the original color is
#DB6AFF, and Hex
#7504BE is the 20% darker color. If the color is saturated by 10%, you get
#A92DFA. If the color is desaturated by 10%, the color
#A741E8 is obtained.