Take the 2-minute tour ×  I've observed this pattern in practice
at many places now, websites put a small contrasting bar on the
top of the page. What is the rationale behind it?  Readability
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Answers  up vote 21 down vote accepted  I think it's part
aesthetics - as @marcintreder suggests - and part visual
anchoring. The horizontal bar is a cue that the page is scrolled
all the way to the top - which is especially useful in
"light"/"minimal"/"uncluttered" designs without so many other
cues.  share|improve this answer add comment  Can't think of
any. It's probably aesthetics. Recently I've been split-testing
top-bars of large eCommerce website. The reason was changes made
due to visual aesthetics     • top of the top bar wasn't making
any statistically significant difference in conversion (cpc
business model, large sample - more than 0,5 mln people), no
matther if it was pale or dark, wit