The hex color #5565dd is a dark color. The web-safe version is Hex
#6666CC. A complementary color is
#AA9A22. The grayscale version is
#888888. A 20% lighter version of the original color is
#8898FF, and Hex
#2232AA is the 20% darker color. If the color is saturated by 10%, you get
#5062E6. If the color is desaturated by 10%, the color
#5A68D4 is obtained.