CREATE TABLE table_55733 ("Model Name" TEXT, "Model #" TEXT, "Color" TEXT, "Switch Type" TEXT, "Interface" TEXT, "Blank Keytops" TEXT, "Introduced" TEXT)

What color is model # pd-kb400w?
SELECT "Color" FROM table_55733 WHERE "Model #" = 'pd-kb400w'
SELECT "Color" FROM "table_55733" WHERE "Model #" = 'pd-kb400w'