The hex color #42349c is a dark color. The web-safe version is Hex
#333399. A complementary color is
#BDCB63. The grayscale version is
#5B5B5B. A 20% lighter version of the original color is
#7567CF, and Hex
#0F0169 is the 20% darker color. If the color is saturated by 10%, you get
#3F30A2. If the color is desaturated by 10%, the color
#453896 is obtained.