The
hefsek taharah (as well as the
bedikot during the
seven clean days) need not be completely clear. Stains that are yellow or light brown (the color of coffee with milk) with
no reddish hue are acceptable and do not invalidate the hefsek or
bedikah. Other shades should be brought to a halachic authority for
evaluation. If you wish to share your location with us, we can try to help you find someone who is trained to evaluate
bedikot.
Please feel free to get back to us with any further questions.
B'Hatzlacha!