The hex color #ececfa is a light color. The web-safe version is Hex
#FFFFFF. A complementary color is
#131305. The grayscale version is
#F1F1F1. A 20% lighter version of the original color is
#FFFFFF, and Hex
#B9B9C7 is the 20% darker color. If the color is saturated by 10%, you get
#ECECFB. If the color is desaturated by 10%, the color
#ECECF9 is obtained.