The hex color #a9b5ef is a light color. The web-safe version is Hex
#99CCFF. A complementary color is
#564A10. The grayscale version is
#C4C4C4. A 20% lighter version of the original color is
#DCE8FF, and Hex
#7682BC is the 20% darker color. If the color is saturated by 10%, you get
#A6B3F3. If the color is desaturated by 10%, the color
#ACB7EB is obtained.