The hex color #90d4cc is a light color. The web-safe version is Hex
#99CCCC. A complementary color is
#6F2B33. The grayscale version is
#BBBBBB. A 20% lighter version of the original color is
#C3FFFF, and Hex
#5DA199 is the 20% darker color. If the color is saturated by 10%, you get
#8CD7CE. If the color is desaturated by 10%, the color
#94D1CA is obtained.