The hex color #42a3fd is a light color. The web-safe version is Hex
#3399FF. A complementary color is
#BD5C02. The grayscale version is
#A1A1A1. A 20% lighter version of the original color is
#75D6FF, and Hex
#0F70CA is the 20% darker color. If the color is saturated by 10%, you get
#39A3FF. If the color is desaturated by 10%, the color
#4BA3F4 is obtained.