The hex color #20778c is a dark color. The web-safe version is Hex
#336699. A complementary color is
#DF8873. The grayscale version is
#616161. A 20% lighter version of the original color is
#53AABF, and Hex
#004459 is the 20% darker color. If the color is saturated by 10%, you get
#1A7990. If the color is desaturated by 10%, the color
#277588 is obtained.