The hex color #12e9df is a light color. The web-safe version is Hex
#00FFCC. A complementary color is
#ED1620. The grayscale version is
#9E9E9E. A 20% lighter version of the original color is
#45FFFF, and Hex
#00B6AC is the 20% darker color. If the color is saturated by 10%, you get
#04F1E6. If the color is desaturated by 10%, the color
#20E2D9 is obtained.