The hex color #1a99ea is a dark color. The web-safe version is Hex
#3399FF. A complementary color is
#E56615. The grayscale version is
#8A8A8A. A 20% lighter version of the original color is
#4DCCFF, and Hex
#0066B7 is the 20% darker color. If the color is saturated by 10%, you get
#0F9BF4. If the color is desaturated by 10%, the color
#2597E0 is obtained.