#2B5271
Closest named color: Deep Sea Blue (#015482). oklch(42.4% 0.068 244.4), rgb(43, 82, 113).
Aa
White text reads best on this color (8.24:1).
About this color
#2B5271 is a dark, muted blue. In OKLCH its lightness is 42%, its chroma 0.068 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Deep Sea Blue (#015482), ΔE 0.034 away. White text reads best on it, at 8.24:1.
| Hue family | Blues |
| Lightness | dark (42%) |
| Chroma | muted (0.068) |
| Temperature | cool |
| Nearest name | Deep Sea Blue (#015482) |
| Black text | 2.54:1 |
| White text | 8.24:1 |
Values
| HEX | #2B5271 |
| RGB | rgb(43, 82, 113) |
| HSL | hsl(207, 45%, 31%) |
| OKLCH | oklch(42.4% 0.068 244.4) |
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 #2B5271 | 8.24:1 | AAA | Lc -93.0 | Preferred for body text |
| Black text on #2B5271 | 2.54:1 | Fails | Lc 15.7 | Dividers and decoration only |
| #2B5271 text on white | 8.24:1 | AAA | Lc 88.3 | Fine for body text |
| #2B5271 text on black | 2.54:1 | Fails | Lc -13.8 | 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
#E4EBF1
oklch(93.6% 0.011 243.7)
-
Step 200
200
#CDDBE7
oklch(88.4% 0.022 243.8)
-
Step 300
300
#ACC4D9
oklch(80.9% 0.04 244.7)
-
Step 400
400
#7FA5C6
oklch(70.6% 0.064 245.1)
-
Step 500
500
#5D8FB8
oklch(63.1% 0.082 244.4)
-
Step 600
600
#4279A4
oklch(55.7% 0.089 244)
-
Step 700
700
#34658C
oklch(49% 0.082 244.7)
-
Step 800
800 (this color)
#2B5271
oklch(42.4% 0.068 244.4)
-
Step 900
900
#28455C
oklch(37.8% 0.053 243.8)
-
Step 950
950
#182836
oklch(27% 0.034 245.9)
#2B5271 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) | #455372 | 0.033 |
| Deuteranopia (no green cones) | #3B4C70 | 0.024 |
| Tritanopia (no blue cones) | #00595D | 0.053 |
| Achromatopsia (no color) | #4F4F4F | 0.068 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B5271
#2B5271
oklch(42.4% 0.068 244.4)
- #684623
#684623
oklch(42.5% 0.068 64.9)
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 #2B5271, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Deep Sea Blue #015482 ΔE 0.034
- Light Navy #155084 ΔE 0.037
- YInMn Blue #415A77 ΔE 0.038
- Light Navy Blue #2E5A88 ΔE 0.042
- Dusk Blue #26538D ΔE 0.046
- Dark Grey Blue #29465B ΔE 0.047
- Petrol #005F6A ΔE 0.049
- Deep Teal #00555A ΔE 0.052
Use #2B5271 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.