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- What colours are used for traffic signals?
- Dark blue is sometimes called ___
- What colour comes after yellow in a rainbow?
- Vermilion, crimson and scarlet are shades of ___
- What colour stands out the most?
- The opposite of black is usually ___
- How many colours are there in a rainbow?
- Roses are red, violets are ___
- How many primary colours are there?
- Hazel eyes are light ___
