Mazal tov on your recent wedding!
A light brown with no hint of a reddish tint may be disregarded on a
hefsek taharah or
bedikah. If we understood correctly that this is what you saw, then you may indeed proceed with immersion as planned. (If we misunderstood, please get back to us with a clearer description of the exact shade.)
In the future, when you ask whether a color on a bedikah cloth is acceptable, you may want to ask whether you can now evaluate that color for yourself. While some "borderline" colors may always require the expertise of a halachic authority, other colors may be clearly acceptable. For these, you can rely on the previous rulings you received,
if you are sure it is the same color shade.
You are correct to include details such as your husband's travel, since they can sometimes affect halachic determinations, especially in borderline cases.
Please write back with any further questions.
