The hex color #3ac4dd is a light color. The web-safe version is Hex
#33CCCC. A complementary color is
#C53B22. The grayscale version is
#9E9E9E. A 20% lighter version of the original color is
#6DF7FF, and Hex
#0791AA is the 20% darker color. If the color is saturated by 10%, you get
#30C8E3. If the color is desaturated by 10%, the color
#44C0D7 is obtained.