A few years ago, some police forces started replacing their white vehicles with silver alternatives, prompting all sorts of speculation as to why.
The reason was not, as some claimed, that silver cars are harder to spot behind you in the rain.
Actually, the forces were choosing silver cars because these held their value better than the more traditional white or black vehicles.
The colour of your car will influence its resale value, although making your choice is not as straightforward as you may think.
For example, in a major 2015 survey by the AA, 21% of people said they'd like their next car to be blue, 2% ahead of the second choice, silver.
However, official figures from the Society of Motor Manufacturers and Traders released at the beginning of the year showed that the most popular colour for new cars was actually white – 22% of all new cars registered in 2014 were white. Blue cars made up only 13% of the total.
In addition, white cars have had by far the greatest increase in popularity – in 2007, only 1% of new cars were white.
So what's going on? Should you buy a white car, a silver car or a blue car if you want the resale price to stay a little higher?
Industry experts at Glass's have crunched the numbers too, and they say the colour that ticks most boxes is not white, or silver or blue. Of course it's not...
They recommend black, with silvers and greys a close second.
However, the colour you should go for depends on the sort of car you are buying. White is where it's at on sports cars, while small cars are popular in red.
If you are in the market for a luxury car and want the best possible resale price, keep the colour sober, it's as simple as that.
Unusual colours are much more of a risk. They are likely to hold their value on sportier vehicles and on 'look-at-me' models such as Minis, but otherwise treat with caution.
Of course, if you really must have that lime green Micra with orange trim, then the chances are you won't be overly concerned about its resale value. Which is probably just as well...