The hex color #10c5d2 is a light color. The web-safe version is Hex
#00CCCC. A complementary color is
#EF3A2D. The grayscale version is
#8D8D8D. A 20% lighter version of the original color is
#43F8FF, and Hex
#00929F is the 20% darker color. If the color is saturated by 10%, you get
#04CBD9. If the color is desaturated by 10%, the color
#1DBFCB is obtained.