Test your Response time!
Click on "Start" first, and wait until the background color changes. As soon as it changes, hit "stop!"
Change background color in:
deeppink
aliceblue
crimson
darkkhaki
cadetblue
darkorchid
coral
chocolate
mediumslateblue
tomato
darkslategray
limegreen
cornflowerblue
darkolivegreen
provided by
JavaScript Kit