in reply to
A row of spades in Recently Active Threads?
My fault. I noticed when I changed the css that controls the colours used for the RAT colours (see RAT Style Settings) that the key didn't change to reflect my colours.
Because of the way the coloured boxes were generated it was non-trivial to apply the user css so I changed the code to apply the css to the forground of a character. For various reasons I chose to use a spade character, but that will likely change to a filled box later today.
DWIM is Perl's answer to Gödel