The hex color #6a70a3 is a dark color. The web-safe version is Hex
#666699. A complementary color is
#958F5C. The grayscale version is
#7F7F7F. A 20% lighter version of the original color is
#9DA3D6, and Hex
#373D70 is the 20% darker color. If the color is saturated by 10%, you get
#686FA7. If the color is desaturated by 10%, the color
#6C729F is obtained.