The hex color #4491d3 is a light color. The web-safe version is Hex
#3399CC. A complementary color is
#BB6E2C. The grayscale version is
#8D8D8D. A 20% lighter version of the original color is
#77C4FF, and Hex
#115EA0 is the 20% darker color. If the color is saturated by 10%, you get
#3D91DA. If the color is desaturated by 10%, the color
#4B91CC is obtained.