The hex color #10537c is a dark color. The web-safe version is Hex
#006666. A complementary color is
#EFAC83. The grayscale version is
#4A4A4A. A 20% lighter version of the original color is
#4386AF, and Hex
#002049 is the 20% darker color. If the color is saturated by 10%, you get
#0A5481. If the color is desaturated by 10%, the color
#165277 is obtained.