The hex color #3e9af9 is a light color. The web-safe version is Hex
#3399FF. A complementary color is
#C16506. The grayscale version is
#9B9B9B. A 20% lighter version of the original color is
#71CDFF, and Hex
#0B67C6 is the 20% darker color. If the color is saturated by 10%, you get
#359AFF. If the color is desaturated by 10%, the color
#479AF0 is obtained.