The hex color #3e88e7 is a dark color. The web-safe version is Hex
#3399FF. A complementary color is
#C17718. The grayscale version is
#8F8F8F. A 20% lighter version of the original color is
#71BBFF, and Hex
#0B55B4 is the 20% darker color. If the color is saturated by 10%, you get
#3687F0. If the color is desaturated by 10%, the color
#4689DE is obtained.