The hex color #ca91b4 is a light color. The web-safe version is Hex
#CC99CC. A complementary color is
#356E4B. The grayscale version is
#B0B0B0. A 20% lighter version of the original color is
#FDC4E7, and Hex
#975E81 is the 20% darker color. If the color is saturated by 10%, you get
#CD8EB4. If the color is desaturated by 10%, the color
#C794B4 is obtained.