Mnemonic Device for visible colour spectrum

Mnemonic Device for visible color spectrum.
Things to remember :	Colors of electromagnetic spectrum in decreasing order of frequency. 1.      Violet 2.      Indigo 3.      Blue 4.      Green 5.      Yellow 6.      Orange 7.      Red
Mnemonic Device Type :	ACRONYM
Mnemonic Device :	1.      VIBGYOR 2.      ROY G. BIV
Explanation :	Take out the first letters of all the colors. Try one from top to bottom and another form bottom to top. You will get as follows: VIBGYOR or ROY G. BIV Pronounce the both words; you will get some sensible word right!
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Remember this one possible way of remembering. If you have another mnemonic device better than this you can use that mnemonic device. Furthermore, if you have another mnemonic device don't forget to post as comment.