My best guess is Song Sparrow ... pretty sure I see a malar (moustache) and a spot centre of chest. Gotta wait for others though.
I'll agree with you Jim. Song Sparrow can vary a lot colourwise; this seems to be a rather dull one, or, it could be a matter of lighting.
Thanks Jimmy and Joanne. The malar was very faint as seen through binoculars and the small spot looked like a continuation of he bar at the side. The light was harsh sunlight. The bird was dull, it looked like a bleached fox sparrow. There were other song sparrows around, this one just looked so different.