Good news if you accidently ordered the 5v version by accident.
Paradise now carries 12v replacement LEDs in
white,
red,
blue,
green, and (unfortunately) "yellow".
Protip:
If you want your yellow button to be sunny yellow instead of sickly pumpkin orange, DO NOT USE THE "YELLOW" LEDs. Use white LEDs instead--order a white LED for each
black rimmed yellow button to be sure. (I placed one of the early orders on this product, and Bryan may have since changed the LEDs to white.

)
The
yellow translucent buttons come with the white LEDs and those look great, as do the black rimmed yellows when they have white LEDs.
Scott