The hex color #65799e is a dark color. The web-safe version is Hex
#666699. A complementary color is
#9A8661. The grayscale version is
#7F7F7F. A 20% lighter version of the original color is
#98ACD1, and Hex
#32466B is the 20% darker color. If the color is saturated by 10%, you get
#6278A1. If the color is desaturated by 10%, the color
#687A9B is obtained.