The hex color #3fc0dd is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#C03F22. The grayscale version is
#9F9F9F. A 20% lighter version of the original color is
#72F3FF, and Hex
#0C8DAA is the 20% darker color. If the color is saturated by 10%, you get
#35C3E3. If the color is desaturated by 10%, the color
#49BDD7 is obtained.