The hex color #3fb8c6 is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#C04739. The grayscale version is
#949494. A 20% lighter version of the original color is
#72EBF9, and Hex
#0C8593 is the 20% darker color. If the color is saturated by 10%, you get
#36BCCB. If the color is desaturated by 10%, the color
#48B4C1 is obtained.