There is no concrete information available regarding Laura Ingalls Wilder's favorite color.
red
She never specifically said what color or colors were her favorites, but one might guess "pink". She ordered her name cards in that color, and her favorite flower - and daughter's name - was Rose, after the prairie roses that bloom in June, which are a deep pink color.
Laura Ingalls's eye color is not specified in historical records.
purple
My. Eyes. Were. Blue.
Carrie Ingalls, the sister of Laura Ingalls Wilder, had light blonde hair.
blue
Laura Ingalls, the character from the Little House on the Prairie book series, is described as having blue eyes.
Laura Ingalls Wilder, the author of the "Little House on the Prairie" book series, had blonde hair. Many illustrations and descriptions in the books depict her with blonde hair.
pink
It is Red.
pink and blue but mostly PINK!