The hex color #687bef is a light color. The web-safe version is Hex
#6666FF. A complementary color is
#978410. The grayscale version is
#9B9B9B. A 20% lighter version of the original color is
#9BAEFF, and Hex
#3548BC is the 20% darker color. If the color is saturated by 10%, you get
#6378F7. If the color is desaturated by 10%, the color
#6D7EE7 is obtained.