Please read the following table in Markdown format and then answer the question according to the table. Table cells in one row are seperated by '|', and different rows are seperated by '
'.

Table:
| Model Name | Model # | Color | Switch Type | Interface | Blank Keytops | Introduced |
| --- | --- | --- | --- | --- | --- | --- |
| Happy Hacking Keyboard | PD-KB02 | White | Membrane | PS/2 , Sun , ADB | No | Dec 20, 1996 |
| Happy Hacking Keyboard | PD-KB02N | White | Membrane | PS/2 , Sun , ADB | No | Dec 20, 1996 |
| Happy Hacking Keyboard Lite | PD-KB100W | White | Membrane | PS/2 | No | Jun 7, 1999 |
| Happy Hacking Keyboard Lite 2 | PD-KB200W/P | White | Membrane | PS/2 | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB200B/P | Black | Membrane | PS/2 | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB200W/U | White | Membrane | USB | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB200B/U | Black | Membrane | USB | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB210W/U | White | Membrane | USB | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB210B/U | Black | Membrane | USB | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB220W/U | White | Membrane | USB | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB220B/U | Black | Membrane | USB | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB220MKW | White | Membrane | USB | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB200MKB | Black | Membrane | USB | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB200MA | White | Membrane | USB | No | Mar 15, 2001 |
| Happy Hacking Keyboard Lite 2 | PD-KB220MA | White | Membrane | USB | No | Mar 15, 2001 |
| 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 |
| Happy Hacking Keyboard Professional JP | PD-KB420W | White | Capacitive | USB | No | Nov 10, 2008 |
| Happy Hacking Keyboard Professional JP | PD-KB420B | Charcoal Gray | Capacitive | USB | No | Nov 10, 2008 |
| Happy Hacking Keyboard Professional HG | PD-KB500W | White | Capacitive | USB | No | Oct 12, 2006 |
| Happy Hacking Keyboard Professional HG | PD-KB500B | Black | Capacitive | USB | No | Oct 12, 2006 |
| Happy Hacking Keyboard Professional HG | PD-KB500WN | White | Capacitive | USB | Yes | Oct 12, 2006 |
| Happy Hacking Keyboard Professional HG | PD-KB500BN | Black | Capacitive | USB | Yes | Oct 12, 2006 |
| Happy Hacking Keyboard Professional HG JAPAN | PD-KB500J | Wajima-style lacquer | Capacitive | USB | Yes | Oct 12, 2006 |
| Happy Hacking Keyboard Professional 2 Type-S | PD-KB400WS | White | Capacitive | USB | No | June 29, 2011 |
| Happy Hacking Keyboard Professional 2 Type-S | PD-KB400WNS | White | Capacitive | USB | Yes | June 29, 2011 |
| Happy Hacking Keyboard Professional JP Type-S | PD-KB420WS | White | Capacitive | USB | No | June 29, 2011 |
Question:
What color is model # pd-kb400w?
Answer:
White