The hex color #53eff9 is a light color. The web-safe version is Hex
#66FFFF. A complementary color is
#AC1006. The grayscale version is
#BEBEBE. A 20% lighter version of the original color is
#86FFFF, and Hex
#20BCC6 is the 20% darker color. If the color is saturated by 10%, you get
#48F4FF. If the color is desaturated by 10%, the color
#5EEAF3 is obtained.