The hex color #4951a2 is a dark color. The web-safe version is Hex
#336699. A complementary color is
#B6AE5D. The grayscale version is
#696969. A 20% lighter version of the original color is
#7C84D5, and Hex
#161E6F is the 20% darker color. If the color is saturated by 10%, you get
#464FA8. If the color is desaturated by 10%, the color
#4C539C is obtained.