The hex color #2c99a1 is a dark color. The web-safe version is Hex
#339999. A complementary color is
#D3665E. The grayscale version is
#777777. A 20% lighter version of the original color is
#5FCCD4, and Hex
#00666E is the 20% darker color. If the color is saturated by 10%, you get
#249CA5. If the color is desaturated by 10%, the color
#34969D is obtained.