#2B3760
Closest named color: Prussian Blue (#1D3557). oklch(34.7% 0.073 269.9), rgb(43, 55, 96).
Aa
White text reads best on this color (11.55:1).
About this color
#2B3760 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.073 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.026 away. White text reads best on it, at 11.55:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.073) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.81:1 |
| White text | 11.55:1 |
Values
| HEX | #2B3760 |
| RGB | rgb(43, 55, 96) |
| HSL | hsl(226, 38%, 27%) |
| OKLCH | oklch(34.7% 0.073 269.9) |
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 #2B3760 | 11.55:1 | AAA | Lc -100.2 | Preferred for body text |
| Black text on #2B3760 | 1.81:1 | Fails | Lc 7.4 | Not readable |
| #2B3760 text on white | 11.55:1 | AAA | Lc 96.5 | Preferred for body text |
| #2B3760 text on black | 1.81:1 | Fails | Lc 0.0 | 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 900.
-
Step 50
50
#F3F5FB
oklch(97% 0.008 271.3)
-
Step 100
100
#E5EAF5
oklch(93.6% 0.016 266.3)
-
Step 200
200
#D1D9EE
oklch(88.6% 0.03 269.1)
-
Step 300
300
#B2C0E5
oklch(80.9% 0.055 268.9)
-
Step 400
400
#8B9ED8
oklch(70.7% 0.088 270.1)
-
Step 500
500
#6F85CE
oklch(63.1% 0.113 270.2)
-
Step 600
600
#586EBB
oklch(55.7% 0.122 270)
-
Step 700
700
#485BA1
oklch(49% 0.114 270.3)
-
Step 800
800
#3B4B82
oklch(42.7% 0.094 269.9)
-
Step 900
900 (this color)
#2B3760
oklch(34.7% 0.073 269.9)
-
Step 950
950
#1D253D
oklch(26.9% 0.046 269.1)
#2B3760 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) | #273B62 | 0.012 |
| Deuteranopia (no green cones) | #21375F | 0.013 |
| Tritanopia (no blue cones) | #134046 | 0.067 |
| Achromatopsia (no color) | #393939 | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3760
#2B3760
oklch(34.7% 0.073 269.9)
- #483800
#483800
oklch(34.8% 0.071 90.8)
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 #2B3760, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.026
- Marine Blue #01386A ΔE 0.039
- Dark Blue Grey #1F3B4D ΔE 0.043
- Dark Grey Blue #29465B ΔE 0.051
- Marine #042E60 ΔE 0.052
- Midnight Green #073B4C ΔE 0.055
- Gunmetal #293241 ΔE 0.055
- Twilight Blue #0A437A ΔE 0.055
Use #2B3760 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.