The hex color #436a7c is a dark color. The web-safe version is Hex
#336666. A complementary color is
#BC9583. The grayscale version is
#636363. A 20% lighter version of the original color is
#769DAF, and Hex
#103749 is the 20% darker color. If the color is saturated by 10%, you get
#406B7F. If the color is desaturated by 10%, the color
#46697A is obtained.