#2B3763
Closest named color: Prussian Blue (#1D3557). oklch(34.9% 0.078 270.4), rgb(43, 55, 99).
Aa
White text reads best on this color (11.47:1).
About this color
#2B3763 is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.078 and its hue 270°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.029 away. White text reads best on it, at 11.47:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.078) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.82:1 |
| White text | 11.47:1 |
Values
| HEX | #2B3763 |
| RGB | rgb(43, 55, 99) |
| HSL | hsl(227, 39%, 28%) |
| OKLCH | oklch(34.9% 0.078 270.4) |
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 #2B3763 | 11.47:1 | AAA | Lc -100.0 | Preferred for body text |
| Black text on #2B3763 | 1.82:1 | Fails | Lc 7.6 | Not readable |
| #2B3763 text on white | 11.47:1 | AAA | Lc 96.3 | Preferred for body text |
| #2B3763 text on black | 1.82:1 | 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
#E5EAF6
oklch(93.7% 0.017 267.8)
-
Step 200
200
#D1D9EF
oklch(88.6% 0.031 269.8)
-
Step 300
300
#B2BFE8
oklch(80.8% 0.06 271.2)
-
Step 400
400
#8A9EDC
oklch(70.8% 0.094 270.2)
-
Step 500
500
#6E84D2
oklch(63% 0.12 270.7)
-
Step 600
600
#576DBF
oklch(55.7% 0.13 270.4)
-
Step 700
700
#475AA5
oklch(49% 0.122 270.7)
-
Step 800
800
#3A4A86
oklch(42.7% 0.101 270.4)
-
Step 900
900 (this color)
#2B3763
oklch(34.9% 0.078 270.4)
-
Step 950
950
#1D253F
oklch(27.1% 0.05 269.9)
#2B3763 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) | #253C65 | 0.016 |
| Deuteranopia (no green cones) | #1E3762 | 0.017 |
| Tritanopia (no blue cones) | #104148 | 0.071 |
| Achromatopsia (no color) | #393939 | 0.078 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #2B3763
#2B3763
oklch(34.9% 0.078 270.4)
- #493800
#493800
oklch(35% 0.071 89.7)
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 #2B3763, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.029
- Marine Blue #01386A ΔE 0.038
- Dark Blue Grey #1F3B4D ΔE 0.047
- Twilight Blue #0A437A ΔE 0.052
- Marine #042E60 ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.053
- Midnight Green #073B4C ΔE 0.059
- Gunmetal #293241 ΔE 0.060
Use #2B3763 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.