The hex color #2381cc is a dark color. The web-safe version is Hex
#3399CC. A complementary color is
#DC7E33. The grayscale version is
#7B7B7B. A 20% lighter version of the original color is
#56B4FF, and Hex
#004E99 is the 20% darker color. If the color is saturated by 10%, you get
#1A82D4. If the color is desaturated by 10%, the color
#2C80C4 is obtained.