The hex color #6f748c is a dark color. The web-safe version is Hex
#666699. A complementary color is
#908B73. The grayscale version is
#7A7A7A. A 20% lighter version of the original color is
#A2A7BF, and Hex
#3C4159 is the 20% darker color. If the color is saturated by 10%, you get
#6E738E. If the color is desaturated by 10%, the color
#70758A is obtained.