Remembering the sequence of colours // canavarlar

rainbow colors

A traditional way of recalling each of the seven colours of the rainbow in
sequence is by using the mnemonic "Richard Of York Gave Battle In Vain",
where the first letter of each word corresponds to the first letter of each
colour. The mnemonic alludes to the defeat of Richard III by Henry Tudor at
the Battle of Bosworth Field. In York, an alternative version is taught that
goes "Rowntrees Of York Gave Best In Value", referring to the
confectionery Rowntrees. Another, less obvious, though more common way
is the use of the meaningless name Roy G. Biv or ROYGBIV. This method is
purely phonetic. Some humorous examples also exist, including "Ring Out
Your Granny's Boots In Vinegar".

A drawback to all these methods is that they include the colour of indigo
between blue and violet, though most modern rainbow definitions do not
include that as a distinct colour, partly due to the poor ability of humans to
distinguish colours in the blue portion of the visual spectrum. Since
rainbows are composed of a nearly continuous spectrum, different people,
most notably across different cultures, identify different numbers of colours
in rainbows.

http://en.wikipedia.org/wiki/Rainbow