The hex color #57d0ef is a light color. The web-safe version is Hex
#66CCFF. A complementary color is
#A82F10. The grayscale version is
#B2B2B2. A 20% lighter version of the original color is
#8AFFFF, and Hex
#249DBC is the 20% darker color. If the color is saturated by 10%, you get
#4ED3F5. If the color is desaturated by 10%, the color
#60CDE9 is obtained.