The hex color #1de1e9 is a light color. The web-safe version is Hex
#33CCFF. A complementary color is
#E21E16. The grayscale version is
#A2A2A2. A 20% lighter version of the original color is
#50FFFF, and Hex
#00AEB6 is the 20% darker color. If the color is saturated by 10%, you get
#10E7F0. If the color is desaturated by 10%, the color
#2ADBE2 is obtained.