Some colors indicate that the area is healthy, while others can signal an Discharge that is a darker shade of yellow, yellowish-green, or green.
However, there are certain types of discharge that can indicate an infection. Abnormal discharge may be yellow or green, chunky in consistency, or foul smelling.
Vaginal discharge may range in color from clear to gray, yellow, greenish, intercourse and urination, as well as irritation and itching of the female genital area.
WebMD explains vaginal discharge -- when it's normal and when it's not. Frothy, yellow or greenish with a bad smell, Trichomoniasis, Pain and itching while Itching or burning, redness and swelling of the vagina or vulva.