Limestone
SW 9599 · #6A655C · LRV 13 — warm red-orange tone, dark — high drama, needs strong daylight or warm bulbs.
- 1Urbane Bronze8
- 2Limestone13
- 3Retreat21
- 4Stardew43
What Color Is Limestone, Really?
Limestone reads as a warm red-orange tone — dark — high drama, needs strong daylight or warm bulbs. The notes below cover how Sherwin-Williams SW 9599 behaves in different light and the closest matches at competing US brands.
Best Rooms and Uses for Limestone
Limestone works best as a feature — a single wall, built-ins, a study or dining room — rather than wrapping a whole bright space. Grays like this read as a modern neutral and sit comfortably alongside both warm woods and cool metals.
How Lighting Changes Limestone
With an LRV of 13, Limestone is a deep, dramatic shade. It soaks up light in north-facing rooms and looks richest where strong daylight hits it. Its orange undertone is the part to watch: it gets picked up by whatever sits next to it, so test it against your trim, floor and the room's main light before committing. Warm artificial light softens it; cool LED can make it look flat, so match your bulbs to the mood you want.
Most complaints about Limestone are a light mismatch. Upload a photo of your actual room and see it on your walls — then ask for the same wall in north light or evening lamps before you buy a single sample.
Need It From Another Brand?
Any paint counter can custom-tint Sherwin-Williams SW 9599 directly. If you would rather stay in one brand's own deck, these are the closest stock matches, measured as ΔE2000. Under 2 is a difference you will not see on the wall.
| Brand | Closest color | ΔE | LRV | |
|---|---|---|---|---|
| Behr | Patio StoneN360-6 · Behr | 0.6 | 13 | Color page → |
| Benjamin Moore | Deep Creek1477 · Benjamin Moore | 0.6 | 15 | Color page → |
| Valspar | Catch of the Day8005-2F · Valspar | 1.1 | 12 | Color page → |
| PPG / Glidden | NevergreenPPG1031-6 · PPG / Glidden | 3.8 | 13 | Color page → |
| Glidden | Grey Squirrel30YY 14/070 · Glidden | 1.9 | 14 | Color page → |
| Dutch Boy | Comforting Neutral440-6DB · Dutch Boy | 1.3 | 14 | Color page → |
Similar Sherwin-Williams Colors
The nearest shades to Limestone within Sherwin-Williams's own range, ranked by perceptual color distance — useful when you want the same look a touch lighter, darker, or warmer.
WCAG 2.1: AA is 4.5 : 1 for normal text, 3 : 1 for large text, AAA is 7 : 1.
Coordinated palette
Generated by hue-rotating #6A655C in HSL space. Pair Limestone with one accent and one neutral — the swatches below are starting points, not final picks.
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