user: Question: What color is model # PD-KB400W?
Columns: ['Model Name', 'Model #', 'Color', 'Switch Type', 'Interface', 'Blank Keytops', 'Introduced']
Types: ['text', 'text', 'text', 'text', 'text', 'text', 'text']
Sample row: ['Happy Hacking Keyboard', 'PD-KB02', 'White', 'Membrane', 'PS/2 , Sun , ADB', 'No', 'Dec 20, 1996']
SQL:

assistant: SELECT "Color" FROM "Table" WHERE "Model #" = 'PD-KB400W';