Table:
text: Happy Hacking Keyboard
Features by model
Features by model
Model_Name Model_ Color Switch_Type Interface Blank_Keytops Introduced
Happy Hacking Keyboard Professional PD-KB300 White Capacitive USB No Apr 24, 2003
Happy Hacking Keyboard Professional PD-KB300B Charcoal Gray Capacitive USB No Apr 24, 2003
Happy Hacking Keyboard Professional PD-KB300NL White Capacitive USB Yes Apr 24, 2003
Happy Hacking Keyboard Professional PD-KB300BN Charcoal Gray Capacitive USB Yes Apr 24, 2003
Happy Hacking Keyboard Professional 2 PD-KB400W White Capacitive USB No Mar 24, 2006
Happy Hacking Keyboard Professional 2 PD-KB400B Charcoal Gray Capacitive USB No Mar 24, 2006
Happy Hacking Keyboard Professional 2 PD-KB400WN White Capacitive USB Yes Mar 24, 2006
Happy Hacking Keyboard Professional 2 PD-KB400BN Charcoal Gray Capacitive USB Yes Mar 24, 2006

Question: What color is the Happy Hacking keyboard model #pd-kb400w?