Home › Benjamin Moore › Blue-green › St. John Blue
St. John Blue CSP-675
On-screen approximation from the published RGB value. Order a physical sample before you decide.
Undertone: Noticeable blue-green undertone
In CIELAB, St. John Blue sits at L* 64.2, a* -9.3, b* -6.7. Its hue angle is 216° and its chroma is 11.4, so it leans blue-green clearly enough to notice on a full wall. It classifies as cool. Among Benjamin Moore colors with a similar LRV (±5), it is warmer (more yellow) than 16%.
LRV 34.0: mid-tone
Light Reflectance Value runs from 0 (absolute black) to 100 (perfect white). At 34.0, St. John Blue is lighter than 37% of Benjamin Moore colors. Reads clearly as a color. Best in rooms with good natural light, or as an accent wall; small dark rooms may feel smaller.
Closest Sherwin-Williams match to St. John Blue
Ranked by CIEDE2000 color difference (ΔE) computed from published RGB values. Below 2 is hard to tell apart on the wall; above 4 is a different color.
| Color | Code | ΔE2000 | How close | |
|---|---|---|---|---|
| Tranquil Aqua | SW 7611 | 2.20 | Close — difference visible side by side | |
| Powder Blue | SW 2863 | 2.57 | Close — difference visible side by side | |
| Aquitaine | SW 9057 | 3.21 | Close — difference visible side by side |
Closest Behr match to St. John Blue
Ranked by CIEDE2000 color difference (ΔE) computed from published RGB values. Below 2 is hard to tell apart on the wall; above 4 is a different color. Behr does not publish LRV, so Behr values here are estimates.
| Color | Code | ΔE2000 | How close | |
|---|---|---|---|---|
| Aqua Gray | BNC-18 | 2.51 | Close — difference visible side by side | |
| Lakeview | ECC-56-3 | 2.62 | Close — difference visible side by side | |
| Dolphin Blue | S470-4 | 3.00 | Close — difference visible side by side |
Similar Benjamin Moore colors
| Color | Code | ΔE2000 | How close | |
|---|---|---|---|---|
| Jamestown Blue | HC-148 | 0.39 | Practically identical | |
| Williamsburg Wythe Blue | CW-590 | 2.36 | Close — difference visible side by side | |
| Province Blue | 2135-40 | 2.40 | Close — difference visible side by side | |
| Franklin Lakes | 1643 | 2.92 | Close — difference visible side by side | |
| Boca Raton Blue | 711 | 3.17 | Close — difference visible side by side | |
| Dusty Cornflower | CSP-605 | 3.41 | Close — difference visible side by side |
Lighter and darker versions
Colors from Benjamin Moore with nearly the same hue and saturation, one step lighter or darker.
- New Hope Gray 2130-50 · lighter, LRV 39.2
- Pike's Peak Gray 2127-50 · lighter, LRV 39.4
- Newborn's Eyes 1663 · lighter, LRV 41.2
- Water's Edge 1635 · darker, LRV 31.5
- Van Courtland Blue HC-145 · darker, LRV 31.5
- Brewster Gray HC-162 · darker, LRV 30.0
Colors that go with St. John Blue
Color-theory pairings — the nearest Benjamin Moore color to each rotated hue, keeping the same lightness and saturation:
- Seaside Sand 2110-40 · complementary (180°)
- Grenada Villa 690 · analogous (−30°)
- Labrador Blue 1670 · analogous (+30°)
- Iris Bliss 1383 · triadic (120°)
- River Gorge Gray 1537 · triadic (240°)
St. John Blue vs popular colors
- Aegean Teal (Benjamin Moore 2136-40, ΔE 8.2) is darker (LRV 25.1 vs 34.0), more yellow/warm.
- Oyster Bay (Sherwin-Williams SW 6206, ΔE 12.8) is lighter (LRV 44.1 vs 34.0), more yellow/warm, more red/pink, more muted.
- Evergreen Fog (Sherwin-Williams SW 9130, ΔE 12.9) is darker (LRV 30.4 vs 34.0), more yellow/warm, more red/pink, more muted.