Whether such birds will turn out to be yellow remains to be seen.
Las Vegas sports books are giving 3-to-1 odds it will be yellow.
The hair may be yellow, auburn, ginger or red, the eyes can be blue-gray or tan, and the skin is white at birth.
Italy winger Andrea Masi was lucky not to be yellow-carded for a tackle that was not only high but off the ground as Simon Danielli jumped to catch.
Kevin Tkachuk became the second Glasgow player to be yellow-carded when he was binned for a ruck offence on 63 minutes and O'Gara kicked a further penalty for Munster.
Shaun Wright-Phillips became the first player to be yellow-carded after 29 minutes for a challenge on Jermaine Jones, but striker Miroslav Klose headed Trochowski's resulting free-kick over the bar.
By now, Newcastle were rampant and Dragons were reduced to 13 men when Andrew Hall became the second player to be yellow-carded inside five minutes, also for preventing release.
Torres's night of frustration etched up a notch when he was booked for a poor tackle on Boyce, with Gerrard becoming the fifth Liverpool to be yellow carded for an equally poor challenge on McCarthy.
But the difference between being green and looking green is reinforced by the fact that photographs of the flash show it to be yellow, and that flashes at sunrise also appear yellow, even to the naked eye.
The RPS said: "We would be very concerned if a patient took a homeopathic preparation to travel to an area where there may be yellow fever, typhoid, malaria, believing they were safe when in fact they wouldn't be safe".
That is what motorists don't like, and why the government has decided they should be painted yellow.
But the location will not be the only change - the familiar green and yellow stripes of the pavilion will be gone, with a new yellow and blue tent in its place.
It will be the largest collection of yellow diamonds ever to be exhibited in the 133-year history of the Birks luxury jewelry chain.
The smallest town on this year's ride is Nemaha (pop. 85), whose residents will be wearing bright yellow T-shirts.
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Manager Sir Alex Ferguson had been confident that the punishments would be downgraded to yellow cards - and earlier this week said: "I am surprised it has carried on this far".
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While the stronger greenback recently has been a bearish factor for the gold market, it can be argued the yellow metal has held up surprisingly well given the persistent strength of the dollar.
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But other research suggests that seeing color can be something like tasting foods -- a pleasant flavor for one person may be too bitter or salty for another, just like a single shade of yellow could be seen as pretty or putrid by different people.
It issued yellow "be aware" warnings for snow and ice across much of the country throughout Monday and Tuesday.
Several inches of snow fell during Sunday and a yellow "be aware" ice warning is now in place for the Eastern region.
The rings must never be shown in Olympic yellow on a white background, because yellow does not contrast enough against a white background.
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Heavy snow - reaching up to 20cm on higher ground - was forecast for the worst-hit areas, along with a number of yellow "be aware" warnings across the rest of the country.
There are yellow "be aware" snow warnings in place for the south-east corner of England and north-eastern Scotland, as well as yellow warnings of ice covering Wales and most of England and Scotland.
The Met Office has issued a yellow "be aware" warning of ice for a large chunk of the UK from London in the south east, across north Wales up to Northern Ireland and across northern England and southern Scotland.
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It will be available in pink, yellow, blue, black, slate and a white and silver combo.
Bright red and neon yellow interiors will be replaced with muted oranges, yellows and subtle greens.
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But the yellow metal will be a hot topic in the next 24 months.
The thinking is that by shipping water north, the strain of overuse on the Yellow River will be relieved.
If the dollar rises, that will be another weight for the yellow metal.
The whole place tends to be bathed in red, yellow or blue color filters, which can get a little tedious.
Anyone who wants one will be able to choose the yellow version, on payment of a small extra fee each year.
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