Mazal tov on your recent marriage!
A light brown with no hint of a reddish tint is usually acceptable, even on a
hefsek taharah. However, it would be best for you to
show the cloth to a halachic authority and to ask if the shade on it needs be asked about in future. At the beginning of marriage it is particularly important to learn by asking questions.
If you’d like to share your location with us, we can try to make an appropriate referral.
Please feel free to get back to us with any further questions.