Would this work (hair color question)

<p>MidwestMom, I’ve been using 7A for a while, but I tend to go a long time between colorings and my hair has just enough undertones that I go reddish after a few weeks. Tried out 6 (light brown) Natural today and love it. Had an office dinner tonight and noone recognized me at first! Hope it doesn’t fade too much, as this color makes my blue eyes really pop out.</p>

<p>I’m about 25% gray with mousy flat light brown, and my hair is terribly thin and sparse (love that chemo). Coloring helps me with volume. No gorgeous gray here. Was a natural medium blond through most of college.</p>