The hex color #51a2cc is a light color. The web-safe version is Hex
#6699CC. A complementary color is
#AE5D33. The grayscale version is
#959595. A 20% lighter version of the original color is
#84D5FF, and Hex
#1E6F99 is the 20% darker color. If the color is saturated by 10%, you get
#4AA3D2. If the color is desaturated by 10%, the color
#58A1C7 is obtained.