#2B4E71
Closest named color: Light Navy (#155084). oklch(41.4% 0.072 249.9), rgb(43, 78, 113).
Aa
White text reads best on this color (8.63:1).
About this color
#2B4E71 is a dark, moderately saturated blue. In OKLCH its lightness is 41%, its chroma 0.072 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.034 away. White text reads best on it, at 8.63:1.
| Hue family | Blues |
| Lightness | dark (41%) |
| Chroma | moderately saturated (0.072) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.43:1 |
| White text | 8.63:1 |
Values
| HEX | #2B4E71 |
| RGB | rgb(43, 78, 113) |
| HSL | hsl(210, 45%, 31%) |
| OKLCH | oklch(41.4% 0.072 249.9) |
Contrast
WCAG 2 contrast ratios are the conformance target: AA needs 4.5:1 for body text and 3:1 for large text, AAA needs 7:1. APCA Lc values are supplementary guidance from the WCAG 3 drafts.
| Pair | WCAG 2 | Result | APCA | APCA guidance |
|---|---|---|---|---|
| White text on #2B4E71 | 8.63:1 | AAA | Lc -94.0 | Preferred for body text |
| Black text on #2B4E71 | 2.43:1 | Fails | Lc 14.5 | Not readable |
| #2B4E71 text on white | 8.63:1 | AAA | Lc 89.5 | Fine for body text |
| #2B4E71 text on black | 2.43:1 | Fails | Lc -12.7 | Not readable |
Tints and shades
A 50–950 scale built in OKLCH: the hue is held, lightness follows a Tailwind v4-like curve, and every step is kept inside the sRGB gamut. This color sits at step 800.
-
Step 50
50
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE8
oklch(88.6% 0.023 248.1)
-
Step 300
300
#ADC3DB
oklch(80.8% 0.042 250.6)
-
Step 400
400
#81A4C9
oklch(70.6% 0.067 250.2)
-
Step 500
500
#608DBC
oklch(63% 0.087 250.4)
-
Step 600
600
#4677A8
oklch(55.6% 0.093 249.8)
-
Step 700
700
#386490
oklch(49.2% 0.086 250)
-
Step 800
800 (this color)
#2B4E71
oklch(41.4% 0.072 249.9)
-
Step 900
900
#2A445E
oklch(37.8% 0.055 249.5)
-
Step 950
950
#192837
oklch(27.1% 0.035 249.2)
#2B4E71 with color blindness
Simulated with the Machado et al. (2009) model. ΔE is how far the color moves: below about 0.02 you would not notice a change.
| Vision | Seen as | Shift (ΔE) |
|---|---|---|
| Protanopia (no red cones) | #3F4F73 | 0.026 |
| Deuteranopia (no green cones) | #364970 | 0.018 |
| Tritanopia (no blue cones) | #00565A | 0.060 |
| Achromatopsia (no color) | #4C4C4C | 0.072 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4E71
#2B4E71
oklch(41.4% 0.072 249.9)
- #64441B
#64441B
oklch(41.4% 0.071 70.1)
Analogous
Neighbouring hues, 30° either side.
Split complementary
The two hues beside the complement (150° and 210°).
Triadic
Three hues spaced 120° apart.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #2B4E71, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.035
- Dark Grey Blue #29465B ΔE 0.041
- Dusk Blue #26538D ΔE 0.046
- Light Navy Blue #2E5A88 ΔE 0.048
- YInMn Blue #415A77 ΔE 0.048
- Twilight Blue #0A437A ΔE 0.050
- Charcoal #264653 ΔE 0.053
Use #2B4E71 in your product
Turn it into light and dark UI roles checked for contrast, then export to Tailwind v4, shadcn/ui, CSS or design tokens.