Classic XKCD Web Comic #315: Braille (described)

A web comic of romance, sarcasm, math, and language.

Scene: Drawing of a stick figure touching a sign. The sign reads “Third Floor Office” with Braille underneath.

Caption: I learned to read Braille a while back, and I’ve noticed that the messages on signs don’t always match the regular text.

Stick Figure’s thought bubble: S-i-g-h-t-e-d-P-e-o-p-l-e-S-u-c-k … Hey!
Hover text: The only big difference I’ve seen is in colors.  Where the regular text reads ‘press red button’, the Braille reads ‘press two-inch button.’