The hex color #e64d3d is a dark color. The web-safe version is Hex
#FF6633. A complementary color is
#19B2C2. The grayscale version is
#7B7B7B. A 20% lighter version of the original color is
#FF8070, and Hex
#B31A0A is the 20% darker color. If the color is saturated by 10%, you get
#F14837. If the color is desaturated by 10%, the color
#DB5243 is obtained.