Will there be a higher-grade customizable offering for us high-karma old timers who haven't seen a top bar in that color for years? I'd hate to associate myself with all these Orange Bars.
Buying, nonetheless. Not to wear in public, of course.
I like the question. Until and unless the person who chose it wishes to answer, here's my attempt at a more-than-complete answer.
I guess orange may be chosen as a rather eye-catching color. A reddish orange may be chosen to be a bit more tasteful or distinctive.
The choice of RGB component values may originate in an older practice in web design called web-safe colors (http://en.wikipedia.org/wiki/Web_colors#Web-safe_colors). It uses the observation that 33 hexadecimal (let's write 0x33) evenly divides the range of an HTML red-green-blue color component: 0x00, 0x33, 0x66, 0x99, 0xCC, 0xFF. Choosing each of the three color components from among these six values yielded 6^3 = 216 colors, a palette that would fit into a low-end graphics adapter's table of 256 colors with room left over for system-defined colors.
Those who have studied Mersenne primes may recall that it is sufficient to observe that 8 is a composite number in order to prove that 0xFF = 0x100 - 1 = 2^8 - 1 is a composite number. And we compute that 2^8 - 1 = 255 which ends in 5, so it's obviously divisible by 5, the quotient being 51 = 0x33.
You get the original color bar whenever you submit or comment, not to mention that it's in the favicon. It's burned on my retinas despite my attempt to replace it with a more rest ful duck-egg blue.
Buying, nonetheless. Not to wear in public, of course.