The hex color #676ebc is a dark color. The web-safe version is Hex
#6666CC. A complementary color is
#989143. The grayscale version is
#868686. A 20% lighter version of the original color is
#9AA1EF, and Hex
#343B89 is the 20% darker color. If the color is saturated by 10%, you get
#646CC1. If the color is desaturated by 10%, the color
#6A70B7 is obtained.