The hex color #3d88e9 is a dark color. The web-safe version is Hex
#3399FF. A complementary color is
#C27716. The grayscale version is
#8F8F8F. A 20% lighter version of the original color is
#70BBFF, and Hex
#0A55B6 is the 20% darker color. If the color is saturated by 10%, you get
#3587F2. If the color is desaturated by 10%, the color
#4589E0 is obtained.