the thing about blond hair is, there are several different blonds -- but basicly 2 types, white blonds/yellow blonds.

i suspect you were a white blonde.. this is commonly called an ash (vs. golden) ash blond often fade to a darker ash.. it not really a brown.. but a very neutral color.. (my own hair has faded to grey... not a nice silver grey, but an ash grey.. sort of color of a grey squirrel.. ) Ash blondes when very light are almost white, shading to beige. (platimum, or tow, (the color of raw flax or flaxen.) golden blondes are sunny, or honey, or amber.. definately a yellow tone

golden blonds often do not fade, or if they do, they fade to a light brown. (clearly a brown color) the consolations is golden blonde are more likely to get brassy -- a hard yellow shade (just from oxidation of the hair over time, but it worse if you color it.) but ash blondes don't!