The hex color #02837f is a dark color. The web-safe version is Hex
#009966. A complementary color is
#FD7C80. The grayscale version is
#575757. A 20% lighter version of the original color is
#35B6B2, and Hex
#00504C is the 20% darker color. If the color is saturated by 10%, you get
#008783. If the color is desaturated by 10%, the color
#0A7F7B is obtained.