The hex color #3cc0d0 is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#C33F2F. The grayscale version is
#999999. A 20% lighter version of the original color is
#6FF3FF, and Hex
#098D9D is the 20% darker color. If the color is saturated by 10%, you get
#33C4D5. If the color is desaturated by 10%, the color
#45BCCB is obtained.