The hex color #236c6f is a dark color. The web-safe version is Hex
#336666. A complementary color is
#DC9390. The grayscale version is
#555555. A 20% lighter version of the original color is
#569FA2, and Hex
#00393C is the 20% darker color. If the color is saturated by 10%, you get
#1E6E72. If the color is desaturated by 10%, the color
#286A6C is obtained.