The hex color #2B2D3A is a dark color. The web-safe version is Hex
#333333. A complementary color is
#D4D2C5. The grayscale version is
#313131. A 20% lighter version of the original color is
#5E606D, and Hex
#000007 is the 20% darker color. If the color is saturated by 10%, you get
#2A2D3B. If the color is desaturated by 10%, the color
#2C2D39 is obtained.