The hex color #e90d51 is a dark color. The web-safe version is Hex
#FF0066. A complementary color is
#16F2AE. The grayscale version is
#6D6D6D. A 20% lighter version of the original color is
#FF4084, and Hex
#B6001E is the 20% darker color. If the color is saturated by 10%, you get
#F5034E. If the color is desaturated by 10%, the color
#DD1754 is obtained.