The hex color #6e88a0 is a light color. The web-safe version is Hex
#669999. A complementary color is
#91775F. The grayscale version is
#878787. A 20% lighter version of the original color is
#A1BBD3, and Hex
#3B556D is the 20% darker color. If the color is saturated by 10%, you get
#6B88A2. If the color is desaturated by 10%, the color
#71889E is obtained.