Jimmie Rogers designed this cool tattoo for his arm, which features the resistor code colors. However, Jimmie put a lot more thought into the design than just the colors:

Most people tend to see just the rainbow, and that leads to lots of fun questions. I’m openly bisexual, and have done queer geeks panels at both CCC-Camp 2011 and again at 28c3. So I’m fine with the ambiguity, which adds itself into the meaning of the tattoo for me.

While I didn’t really need to have the colors implanted into my skin (already have them memorized), it will be a fun way of teaching others how to read the colors in classes. Also, I had the tattoo made to be five inches long, making each block one half inch. So I can use this tattoo as a reasonable-guess ruler. Being skin, it stretches and deforms, so I’ll have to learn the proper way to hold my arm so that it’s at least moderately accurate.

The next part of the tattoo, is that I programmed it in processing. It’s obviously open source, so do with it what you will.

So in summary, it’s a resistor color code chart, it’s a rainbow, it’s a ruler, it’s got both the golden ratio and Tau built in, and it was written in a programming language. So it’s a meaningful tattoo that’s also useful for me beyond looking great.