The hex color #61556c is a dark color. The web-safe version is Hex
#666666. A complementary color is
#9EAA93. The grayscale version is
#616161. A 20% lighter version of the original color is
#94889F, and Hex
#2E2239 is the 20% darker color. If the color is saturated by 10%, you get
#61546D. If the color is desaturated by 10%, the color
#61566B is obtained.