#0B376A
Closest named color: Marine Blue (#01386A). oklch(33.9% 0.1 255.4), rgb(11, 55, 106).
Aa
White text reads best on this color (11.87:1).
About this color
#0B376A is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.100 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.005 away. White text reads best on it, at 11.87:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.100) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.87:1 |
Values
| HEX | #0B376A |
| RGB | rgb(11, 55, 106) |
| HSL | hsl(212, 81%, 23%) |
| OKLCH | oklch(33.9% 0.1 255.4) |
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 #0B376A | 11.87:1 | AAA | Lc -100.4 | Preferred for body text |
| Black text on #0B376A | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #0B376A text on white | 11.87:1 | AAA | Lc 96.8 | Preferred for body text |
| #0B376A text on black | 1.76:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF5
oklch(88.5% 0.042 255)
-
Step 300
300
#A0C3F1
oklch(80.8% 0.076 255.4)
-
Step 400
400
#6CA3EA
oklch(70.7% 0.12 255.3)
-
Step 500
500
#428AE4
oklch(63.1% 0.154 255.4)
-
Step 600
600
#1E72D2
oklch(55.7% 0.167 255.3)
-
Step 700
700
#0E5FB6
oklch(49.2% 0.155 255.3)
-
Step 800
800
#114E93
oklch(42.7% 0.128 255.2)
-
Step 900
900 (this color)
#0B376A
oklch(33.9% 0.1 255.4)
-
Step 950
950
#0F2745
oklch(27.1% 0.064 255.3)
#0B376A 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) | #1B3C6C | 0.022 |
| Deuteranopia (no green cones) | #043369 | 0.014 |
| Tritanopia (no blue cones) | #00434B | 0.075 |
| Achromatopsia (no color) | #373737 | 0.100 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B376A
#0B376A
oklch(33.9% 0.1 255.4)
- #4D3100
#4D3100
oklch(33.9% 0.072 74.4)
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 #0B376A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.005
- Marine #042E60 ΔE 0.032
- Prussian Blue #1D3557 ΔE 0.035
- Twilight Blue #0A437A ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.058
- Midnight Green #073B4C ΔE 0.058
- Dark Grey Blue #29465B ΔE 0.068
- Gunmetal #293241 ΔE 0.075
Use #0B376A 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.