The hex color #2f99b2 is a dark color. The web-safe version is Hex
#339999. A complementary color is
#D0664D. The grayscale version is
#7E7E7E. A 20% lighter version of the original color is
#62CCE5, and Hex
#00667F is the 20% darker color. If the color is saturated by 10%, you get
#279CB7. If the color is desaturated by 10%, the color
#3796AD is obtained.