The hex color #450a9c is a dark color. The web-safe version is Hex
#330099. A complementary color is
#BAF563. The grayscale version is
#4E4E4E. A 20% lighter version of the original color is
#783DCF, and Hex
#120069 is the 20% darker color. If the color is saturated by 10%, you get
#4403A4. If the color is desaturated by 10%, the color
#461194 is obtained.