The hex color #2c81d0 is a dark color. The web-safe version is Hex
#3399CC. A complementary color is
#D37E2F. The grayscale version is
#7F7F7F. A 20% lighter version of the original color is
#5FB4FF, and Hex
#004E9D is the 20% darker color. If the color is saturated by 10%, you get
#2481D8. If the color is desaturated by 10%, the color
#3481C8 is obtained.