 | | Colour is written "color" and "grey" is written "gray" in American English. |
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Colours Note that these colours may vary slightly, depending on your browser and operating system. The 7 colours of the rainbowThe seven colours of the rainbow are the "visible" part of the electro-magnetic spectrum - they are visible to (or can be seen by) the human eye. A rainbow is what we sometimes see in the sky when the sun is shining and it is raining somewhere at the same time. | ultra-violet | not a colour - invisible to the human eye | | 7 violet | | These are the 7 colors of the rainbow - the "visible spectrum" (visible to the human eye) | | 6 indigo | | | 5 blue | | | 4 green | | | 3 yellow | | | 2 orange | | | 1 red | | | infra-red | not a colour - invisible to the human eye |
This mnemonic can help you remember the colours of the rainbow and their order:
Richard Of York Gave Battle In Vain NB: The prefix "infra-" means "below" or "under". Infra-red is "below" the colour red (and not visible). The prefix "ultra-" means "beyond". Ultra-violet is "beyond" the colour violet (and not visible). A few other colours Technically, white is not a colour (it is a combination of all colours), and black is not a colour (it is the absence of all colours). But in normal language we usually describe white, black and grey as colours.
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