Tidewater (SW 6477) vs Watery (SW 6478)
Quick decision
- Lighter
- Tidewater, LRV 65 vs 57.
- Warmer
- About the same, both blue-gray (Lab b* -0.3 vs -1.2).
- North rooms
- Tidewater keeps more brightness (L* 80.5 vs 76.3 in north light); both drift gray about equally.
- Trim that works
- Bravo Blue SW 6784, #D3E7E9, LRV 77: the Sherwin-Williams white closest in hue to both.
- Closeness
- deltaE 3.1, noticeably different. At 3.1, test both: on a full wall the difference will show.
See each color
Tidewater (SW 6477) is lighter than Watery (SW 6478) and about as warm: LRV 65 vs 57, deltaE 3.1 (noticeably different).
Side by side
| Measure | Tidewater | Watery | Gap |
|---|---|---|---|
| Brand | Sherwin-Williams | Sherwin-Williams | |
| Color code | SW 6477 | SW 6478 | |
| Hex | #C3D7D3 | #B4CCC9 | |
| RGB | 195, 215, 211 | 180, 204, 201 | |
| HSL | 168°, 20%, 80% | 172°, 19%, 75% | |
| LRV (light reflectance value) | 65 | 57 | +8 |
| Lab L* | 84.4 | 80.2 | +4.2 |
| Lab a* | -7.4 | -8.6 | +1.2 |
| Lab b* | -0.3 | -1.2 | +0.9 |
| Undertone | Cool Green | Cool Green | |
| Temperature | neutral | neutral | |
| Color family | Green | Green |
Same paint, two kinds of light
Tidewater (SW 6477), published as #C3D7D3
#B1CDD1
#D6E1D3
Watery (SW 6478), published as #B4CCC9
#A2C2C7
#C7D6C9
These swatches and the rooms above are a simulation, not a measurement. How the visualizer works
Which should you pick
Rules of thumb computed from the LRV and Lab values in the table above; no room test was done.
- Pick Tidewater (SW 6477) for a small room or a north-facing room, because it is 8 LRV points lighter (65 vs 57), so it bounces back more of the limited light
Closest matches to Tidewater in other brands
Closest matches to Watery in other brands
Common questions
- Is Tidewater the same color as Watery?
- They are noticeably different: a CIEDE2000 difference of 3.1. Most people can see the difference between Tidewater and Watery side by side.
- Which is lighter, Tidewater or Watery?
- Tidewater, with an LRV of 65 against 57.
Full pages
Related comparisons
Sources: LRV and hex as published by the manufacturer, via PaintDB (CC BY 4.0). Color differences are CIEDE2000 values computed by this site from the hex values (data snapshot 2026-10-01). Color names and codes belong to their manufacturers.