The hex color #211e28 is a dark color. The web-safe version is Hex
#333333. A complementary color is
#DEE1D7. The grayscale version is
#222222. A 20% lighter version of the original color is
#54515B, and Hex
#000000 is the 20% darker color. If the color is saturated by 10%, you get
#211E29. If the color is desaturated by 10%, the color
#211E27 is obtained.