The hex color #a5c1c3 is a light color. The web-safe version is Hex
#99CCCC. A complementary color is
#5A3E3C. The grayscale version is
#B8B8B8. A 20% lighter version of the original color is
#D8F4F6, and Hex
#728E90 is the 20% darker color. If the color is saturated by 10%, you get
#A3C2C4. If the color is desaturated by 10%, the color
#A7C0C2 is obtained.