#2B4F73
Closest named color: Light Navy (#155084). oklch(41.8% 0.074 250), rgb(43, 79, 115).
Aa
White text reads best on this color (8.50:1).
About this color
#2B4F73 is a dark, moderately saturated blue. In OKLCH its lightness is 42%, its chroma 0.074 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Light Navy (#155084), ΔE 0.031 away. White text reads best on it, at 8.50:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Light Navy (#155084) |
| Black text | 2.46:1 |
| White text | 8.50:1 |
Values
| HEX | #2B4F73 |
| RGB | rgb(43, 79, 115) |
| HSL | hsl(210, 46%, 31%) |
| OKLCH | oklch(41.8% 0.074 250) |
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 #2B4F73 | 8.50:1 | AAA | Lc -93.7 | Preferred for body text |
| Black text on #2B4F73 | 2.46:1 | Fails | Lc 14.9 | Not readable |
| #2B4F73 text on white | 8.50:1 | AAA | Lc 89.1 | Fine for body text |
| #2B4F73 text on black | 2.46:1 | Fails | Lc -13.1 | 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
#CEDBE9
oklch(88.6% 0.024 250.1)
-
Step 300
300
#ACC3DC
oklch(80.8% 0.043 250.6)
-
Step 400
400
#80A4CA
oklch(70.6% 0.069 250.2)
-
Step 500
500
#5F8DBD
oklch(63% 0.089 250.4)
-
Step 600
600
#4577A9
oklch(55.6% 0.095 249.9)
-
Step 700
700
#366491
oklch(49.1% 0.089 249.6)
-
Step 800
800 (this color)
#2B4F73
oklch(41.8% 0.074 250)
-
Step 900
900
#29445F
oklch(37.8% 0.057 249.6)
-
Step 950
950
#182838
oklch(27.1% 0.037 249.3)
#2B4F73 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) | #405175 | 0.027 |
| Deuteranopia (no green cones) | #364972 | 0.020 |
| Tritanopia (no blue cones) | #00575C | 0.059 |
| Achromatopsia (no color) | #4D4D4D | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B4F73
#2B4F73
oklch(41.8% 0.074 250)
- #66451A
#66451A
oklch(41.9% 0.074 70.3)
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 #2B4F73, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Light Navy #155084 ΔE 0.031
- Deep Sea Blue #015482 ΔE 0.032
- Dusk Blue #26538D ΔE 0.043
- Light Navy Blue #2E5A88 ΔE 0.044
- Dark Grey Blue #29465B ΔE 0.045
- YInMn Blue #415A77 ΔE 0.045
- Twilight Blue #0A437A ΔE 0.051
- Dusk #4E5481 ΔE 0.055
Use #2B4F73 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.