The hex color #3b7cdd is a dark color. The web-safe version is Hex
#3366CC. A complementary color is
#C48322. The grayscale version is
#878787. A 20% lighter version of the original color is
#6EAFFF, and Hex
#0849AA is the 20% darker color. If the color is saturated by 10%, you get
#337BE6. If the color is desaturated by 10%, the color
#437DD4 is obtained.