The hex color #217d3c is a dark color. The web-safe version is Hex
#336633. A complementary color is
#DE82C3. The grayscale version is
#494949. A 20% lighter version of the original color is
#54B06F, and Hex
#004A09 is the 20% darker color. If the color is saturated by 10%, you get
#1D823B. If the color is desaturated by 10%, the color
#25783D is obtained.