The hex color #dff3f9 is a light color. The web-safe version is Hex
#CCFFFF. A complementary color is
#200C06. The grayscale version is
#EEEEEE. A 20% lighter version of the original color is
#FFFFFF, and Hex
#ACC0C6 is the 20% darker color. If the color is saturated by 10%, you get
#DDF3FA. If the color is desaturated by 10%, the color
#E1F3F8 is obtained.