The hex color #3d7ed9 is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#C28126. The grayscale version is
#878787. A 20% lighter version of the original color is
#70B1FF, and Hex
#0A4BA6 is the 20% darker color. If the color is saturated by 10%, you get
#367DE1. If the color is desaturated by 10%, the color
#447FD1 is obtained.