Purple is a fence-sitter, and needs to make up its mind on a few things. As a combination of red and blue, it’s neither warm nor cool (though unlike us, it’s considered cool in most instances). Alternatively, as a combination of red and blue, purple is simultaneously warm and cool. However you look at it, purple is hard to pin down.
Further, some people aren’t even sure if purple is one color or two. Isaac Newton’s original list of seven pure spectral hues included violet and indigo (violet leans toward red, indigo towards blue). Most people who are not Isaac Newton or do not work for Crayola, however, consider everything between blue and red on the color wheel purple.
Not only is purple hard to categorize or even name, it can be a little full of itself. In many cultures, it’s the color of nobility and royalty (well, la-dee-da!). It’s associated with magic, mystery, and spirituality. According to an article on About.com, “Purple has a special, almost sacred place in nature: lavender, orchid, lilac, and violet flowers are often delicate and considered precious.” Precious indeed. And as if that’s not enough to stroke purple’s ego, hue number 18-3943 (called “Blue Iris,” but really it’s purple) was named Pantone’s color of the year in 2008.
While purple does tend to look down its nose at the world, it is redeemed (somewhat) by its association with one of the all-time-great children’s books, Harold and the Purple Crayon.
Along with orange and green, it’s a secondary color. Used with its complement, yellow, purple creates a bold, high-frequency palette (as with the uniforms and logo of the extra-annoying Los Angeles Lakers basketball team). Used with blue or red, it creates a more subtle analogous palette.
On the color spectrum, purple (or violet, or whatever) lies at the very shortest frequency of wavelengths visible to human eye (measured in the chart here in nanometers). Go any lower on that spectrum beyond the visible frequencies and you get ultraviolet light, which, like this blog, can cause skin irritation if you don’t protect yourself. (Go past red on the other end of the visible spectrum and you get infrared light.)
As with all colors, purple has varied and sometimes contradictory associations in different cultures. In the US military, the Purple Heart recognizes the courage of wounded personnel. According to the article All About the Color Purple on the website Sensational Color, purple is worn by Catholic priests (sometimes), Thai widows, Minnesota Vikings, and Ukrainian eggs. It’s the color of wealth and status in Japan, and virtue and faith in Egypt.
Purple is not commonly used in logo design, so it was kind of big news in nerd/geek circles a couple years ago when Yahoo changed its mark from red to purple. (I think everyone remembers where they were when they first heard that news in June 2008.)
For designers, purple’s schizofrenic, warm/cool nature offers the opportunity to create a rich palette based just on this one color. The combination of warm purple (trending toward violet or magenta) with cool purple (trending toward indigo or very dark blue) makes effective use of just a small portion of the color wheel while still featuring enough contrast to be interesting.
Used creatively and appropriately, purple can be striking and powerful. Just don’t tell it I said so or it’ll get an even bigger head than it already has.