The hex color #2783B7 is a dark color. The web-safe version is Hex
#3399CC. A complementary color is
#D87C48. The grayscale version is
#767676. A 20% lighter version of the original color is
#5AB6EA, and Hex
#005084 is the 20% darker color. If the color is saturated by 10%, you get
#1F84BE. If the color is desaturated by 10%, the color
#2F82B0 is obtained.