The hex color #42949c is a dark color. The web-safe version is Hex
#339999. A complementary color is
#BD6B63. The grayscale version is
#7B7B7B. A 20% lighter version of the original color is
#75C7CF, and Hex
#0F6169 is the 20% darker color. If the color is saturated by 10%, you get
#3C969F. If the color is desaturated by 10%, the color
#489299 is obtained.