Hi,
This is going to be a fairly intensive tutorial and you may want to print it out: but don't worry

This method will work only if you have a Mac (with the built-in Automator, plus MS Excel (if not, Apple's Number may be fine too).
1. Visit
http://www.computerhope.com/htmcolor.htm
and scroll down till you see "Color code chart" that is very long!
Drag a few cells beginning from "Color Name".
Scroll down the page until you see the end of the table,
and Shift+Click "TO THE RIGHT (outside!! cell) of "White"
(if you click inside White cell, a new page may open)
Once the entire Color Code Chart (three column table) is selected, Copy by Command-C
2. Open a new Excel document and paste the table content
3. Remove the rows with colors that you don't want: leave only the rows with colors you want WITHOUT blank lines. It will look like this: You will want ~200 different colors (rows) left in your Excel file
Gold #D4A017 Gold
Sepia #7F462C Sepia
...
(Remember, remove any blank rows)
4. Place a cursor in the first (top-most) Hex code cell (containing something like #D4A017)
5. Open your Photoshop: Menu > Edit > Keyboard shortcuts > Shortcuts For: Tools > Foreground Color Picker: click the right side and enter "n" without quotations > OK
Create a new file and leave a background white
Place your furniture photo on the upper layer and remove background margins (Magic Wand > delete)
Create a new layer and change the blending mode to Color
Save the file as a PSD file somewhere
Make sure the topmost "Color" layer is selected
=====
Here is an interesting part:
6. Download the Automator Workflow file I attached on this message and open it in Automator (by double click)
Click the small arrow on left of the "Launch Application" action to make sure the MS Excel application is correctly referring to your Excel in YOUR folder (if not, find your Excel application in the "Other" option inside the pull-down menu of the "Launch Application" action)
Likewise, turn the triangle of the 2nd "Launch Application" to link the Photoshop program that YOU have in YOUR folder
7. By default, I coded the individually colored images will be saved in PNG file format. If you want to save them as PSD files, open the last "Run AppleScript" action (by turning the triangle) and remove -- of the very first and very last lines. Then, open the other "Run AppleScript" action (right on top of the last Run Applescript action) and add -- at the beginning of the first and last lines.
Save the Workflow.
8. Find out (using Excel file's left column) how many different colors you have for your image (say, 200 colors). Then, turn the triangle of the Loop action and put this number (eg. 200) in the "Stop after" space.
9. Now, exciting part:
Make sure your Excel file with color code table is turned on and the first Hex cell is selected.
Make sure your furniture photoshop file is turned on and the top layer (with Color blending mode) is selected.
Go to Automator and run the workflow by clicking Run button on top right corner.
10. Enjoy the ever-growing PNG files with all different colored furniture photos in the designated folder (file names will be identical to the color Hex code).
* When I Save As PSD file, my PS asks for confirmation of "Maximum Compatibility" always, and hence my workflow addresses this by sending a Return keystroke once more. If your PS does not do this, you may want to delete the Return keystroke in the bottom two "Run AppleScript"s
* Depending on PS versions, the Save As dialog box may be different. Mine is CS6 so my actions are based on mine. if your dialog box has more/less TAB-selectable items, you may need to adjust the number of Shift Tab (moving backwords) in the bottom two "Run AppleScripts".
GOOD LUCK!