The hex color #275cfc is a dark color. The web-safe version is Hex
#3366FF. A complementary color is
#D8A303. The grayscale version is
#808080. A 20% lighter version of the original color is
#5A8FFF, and Hex
#0029C9 is the 20% darker color. If the color is saturated by 10%, you get
#1E58FF. If the color is desaturated by 10%, the color
#3060F0 is obtained.