Soldering a nicer coloured SMD LED over the top of the blue LED works well. Most colours have a lower voltage drop, so the blue doesn't glow at all.
Worked well for my pocketbeagle board which was annoying me, my initial attempts a desoldering the blue one were unsuccessful (no hot air), but a nice amber one in parallel worked great.
For desoldering without hot air, "chip quik" products are excellent. They make low melting point solder (like 60C). Add some to each pad of the led, and they will stay liquid long enough to remove the led with tweezers.
Worked well for my pocketbeagle board which was annoying me, my initial attempts a desoldering the blue one were unsuccessful (no hot air), but a nice amber one in parallel worked great.