Verified from FlooringFX Costco / Harmonics reference (page 342) + archive comment context on post 112 · eras approximate · last updated 2026-10-28
Harmonics Royal Mahogany is a Costco-era warehouse-club laminate color identified on carton ends as part RM203S. Some manufacturer depleted lists spell the color Royal Mohagany. Costco was no longer stocking it when FlooringFX commenters asked; NEED and HAVE threads sought leftover boxes after the warehouse drop. FlooringFX archives include both repair-size NEED asks (~4–5 boxes) and larger HAVE offers.
This page is a citeable ID hub for leftover matching. It does not list live inventory. Confirm the brand strip and part string on your carton before buying or posting a Match listing.
Need Royal Mahogany leftovers, or have spare RM203S boxes?
Free for a limited time · normally $10
Identification
| Field | Verified value |
|---|---|
| Common name | Royal Mahogany (also written Royal Mohagany on some depleted lists) |
| Brand / line | Harmonics (Costco warehouse-club laminate; Mohawk-associated) |
| Part / model | RM203S |
| Approx. era | Same Costco leftover market as other Harmonics colors; Costco no longer stocked when commenters asked |
| Archive context | NEED threads for ~4–5 boxes after discontinue; HAVE offers of multi-box pallets in FlooringFX comment history |
| Locking | Many Harmonics runs used Uniclic; confirm the profile on a spare plank |
| Name collision | Do not confuse with non-Harmonics Mohawk “Royal Mahogany” hardwood strings or other mahogany-named retail colors |
How to ID Royal Mahogany on a carton
- Read the brand strip: it should say Harmonics (Costco-era), not a generic Mohawk hardwood carton or another house brand.
- Match the color name Royal Mahogany (watch for the depleted-list spelling Royal Mohagany) and part
RM203S. - Measure a spare plank and photograph the full carton end before you post a Match listing.
- Reject look-alikes that only share the word mahogany: different locking, thickness including pad, or brand strip means no click-in match.
Full Costco / Harmonics table: Discontinued Costco / Harmonics flooring reference. Carton-end walkthrough: label decoder. Name traps: name collisions.
Where people look for leftovers
- FlooringFX Match: post NEED or HAVE with carton photos and
RM203S. Browse the Match board first. - Mohawk outlet / factory closeout patterns: same path noted on the Costco Harmonics hub. Depleted lists may still name the color; they do not restock Costco warehouse SKUs for retail repair.
- Leftover channels: Marketplace, Craigslist, and other channels in where people look for leftover discontinued flooring.
- Repair volume: see how many leftover boxes most repairs need for typical repair bands.
What will not match
- Non-Harmonics Mohawk “Royal Mahogany” hardwood or other mahogany product strings
- Home Depot TrafficMaster / LifeProof mahogany or cherry look-alikes
- Lowe’s Style Selections or allen + roth colors that only share a wood-tone word
- Pergo XP colors that only look similar in a photo. For XP contrast, see the Pergo XP colors reference.
Ready to match Royal Mahogany (RM203S)?
Free for a limited time · normally $10
Sources: FlooringFX Costco / Harmonics reference; archive thread Harmonics / Home Design leftovers (comment context for Royal Mahogany NEED/HAVE activity; comments are not republished here as listings); public Mohawk depleted lists noting RM203S / Royal Mohagany spelling variants. Eras approximate. No leftover inventory is offered for sale by FlooringFX.