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Celtic Blue ES-31
On-screen approximation from the published RGB value. Order a physical sample before you decide.
Undertone: Subtle blue undertone
In CIELAB, Celtic Blue sits at L* 73.0, a* -2.8, b* -5.0. Its hue angle is 241° and its chroma is 5.7, so it leans blue only slightly — the undertone mostly shows next to whiter or grayer colors. It classifies as cool. Among Benjamin Moore colors with a similar LRV (±5), it is warmer (more yellow) than 17%.
LRV 45.1 (estimated): mid-tone
Light Reflectance Value runs from 0 (absolute black) to 100 (perfect white). At 45.1 (estimated), Celtic Blue is lighter than 49% 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 Celtic 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 | |
|---|---|---|---|---|
| Lakeside | SW 9683 | 1.18 | Very close | |
| Jubilee | SW 6248 | 1.86 | Very close | |
| Stardew | SW 9138 | 2.27 | Close — difference visible side by side |
Closest Behr match to Celtic 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 | |
|---|---|---|---|---|
| Intercoastal Gray | MQ5-23 | 0.42 | Practically identical | |
| Shaved Ice | N490-3 | 0.57 | Practically identical | |
| Shadow Blue | N480-3 | 1.12 | Very close |
Similar Benjamin Moore colors
| Color | Code | ΔE2000 | How close | |
|---|---|---|---|---|
| Manor Blue | 1627 | 1.39 | Very close | |
| French Toile | CSP-595 | 1.72 | Very close | |
| Solitude | AF-545 | 1.99 | Very close | |
| Santorini Blue | 1634 | 2.68 | Close — difference visible side by side | |
| Blue Heather | 1620 | 2.70 | Close — difference visible side by side | |
| Athabasca | CC-816 | 2.70 | 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.
- Lavender Blue 1438 · lighter, LRV 49.0
- Blue Springs 1592 · lighter, LRV 48.7
- Wedgewood Gray HC-146 · lighter, LRV 49.6
- Subway Tile® CSP-585 · darker, LRV 42.6
- Pigeon Gray 2133-50 · darker, LRV 42.2
- Slate Blue 1648 · darker, LRV 43.2
Colors that go with Celtic Blue
Color-theory pairings — the nearest Benjamin Moore color to each rotated hue, keeping the same lightness and saturation:
- Sandlot Gray 2107-50 · complementary (180°)
- Beneath the Clouds 2131-50 · analogous (−30°)
- Lavender Blue 1438 · analogous (+30°)
- Victorian Mauve 2114-50 · triadic (120°)
- Sea Haze 2137-50 · triadic (240°)
Celtic Blue vs popular colors
- Smoke (Benjamin Moore 2122-40, ΔE 5.9) is lighter (LRV 56.4 vs 45.1), more yellow/warm, more green.
- Coventry Gray (Benjamin Moore HC-169, ΔE 6.6) is lighter (LRV 48.2 vs 45.1), more yellow/warm, more red/pink, more muted.
- Oyster Bay (Sherwin-Williams SW 6206, ΔE 8.7) is about as light, more yellow/warm.