The hex color #a90ef8 is a dark color. The web-safe version is Hex
#9900FF. A complementary color is
#56F107. The grayscale version is
#909090. A 20% lighter version of the original color is
#DC41FF, and Hex
#7600C5 is the 20% darker color. If the color is saturated by 10%, you get
#AC01FF. If the color is desaturated by 10%, the color
#A61BEE is obtained.