We stepped into Asia Crafts next door, where silver-tongued Kashmiris unrolled carpets that seemed to change colour every time they were turned upside-down.
The Saint Lawrence, an almost constant by my side, seemed to change colour throughout the day, from choppy, muddy brown to a calm, silvery blue.
The next stage, currently still in the laboratory, is to develop coatings that change colour when they absorb toxic chemicals, thus alerting soldiers that they are under chemical attack.
That is because electronic paper does not need backlighting in the way that liquid-crystal displays do (see article) and making beads or capsules change colour does not take much energy.
So called rainbow proteins (a spin-off from work into bioluminescence), which change colour in response to particular compounds, are also an option for detecting environmental toxins, or the potential agents of terrorism.
Lastly, whoever wins will have the chance to change the colour of the Supreme Court.
Irvine is a planned community where you cannot change the colour of your door without getting permission.
However, the Queen has decided not to give permission for a change of colour for her official London residence.
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Fancy, with tinted lenses, you can even change the colour of your eyes.
Clothes that change their colour and shape depending on the wearer's movement are being developed by researchers at a Canadian university.
At each level they are shown how to adapt the experience by editing the code behind the game - to slow things down for example, or change a colour.
Many toothpastes on the market claim to have 'whitening' properties - meaning that they may remove stains, rather than change the natural colour of the teeth.
He said that they thought it was the first time in the company's history that there had been a permanent change to the colour of the post boxes.
At this stage, however, using the protein that way could turn reading into a truly electrifying experience: a charge of about 4, 000 volts is needed to trigger the colour change.
LEDs offer flexible lighting that can change in intensity and colour.
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For example, it is offering a service to mobile-phone companies in which subscribers can go online to change the shape, colour and other features of the case of their new phone.
"Mexico was an absolute change, it was full of colour, full of sun, so unlike Europe, " he says.
The X-Change went well with Professor Pete Vukusic bringing colour and iridescent butterflies to the proceedings, and Clifford Stott getting a rise out of the audience on why people become violent in groups.
Roza Otunbayea, leader of the Ata-Jurt (Fatherland) movement, who was denied registration as a candidate, insists that yellow is the colour: it means ready for change, she says, as in a traffic light.
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