The hex color #657ef3 is a light color. The web-safe version is Hex
#6666FF. A complementary color is
#9A810C. The grayscale version is
#9D9D9D. A 20% lighter version of the original color is
#98B1FF, and Hex
#324BC0 is the 20% darker color. If the color is saturated by 10%, you get
#5F7BFC. If the color is desaturated by 10%, the color
#6B81EA is obtained.