#0A376C
Closest named color: Marine Blue (#01386A). oklch(34.1% 0.104 255.8), rgb(10, 55, 108).
Aa
White text reads best on this color (11.82:1).
About this color
#0A376C is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.104 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.007 away. White text reads best on it, at 11.82:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.104) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.77:1 |
| White text | 11.82:1 |
Values
| HEX | #0A376C |
| RGB | rgb(10, 55, 108) |
| HSL | hsl(212, 83%, 23%) |
| OKLCH | oklch(34.1% 0.104 255.8) |
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 #0A376C | 11.82:1 | AAA | Lc -100.3 | Preferred for body text |
| Black text on #0A376C | 1.77:1 | Fails | Lc 0.0 | Not readable |
| #0A376C text on white | 11.82:1 | AAA | Lc 96.7 | Preferred for body text |
| #0A376C text on black | 1.77:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E0EBF9
oklch(93.6% 0.022 254.4)
-
Step 200
200
#C7DBF6
oklch(88.5% 0.043 255.9)
-
Step 300
300
#A0C3F3
oklch(80.9% 0.078 256.4)
-
Step 400
400
#6BA3ED
oklch(70.8% 0.124 255.8)
-
Step 500
500
#4089E7
oklch(63% 0.159 256)
-
Step 600
600
#1B71D5
oklch(55.6% 0.172 255.8)
-
Step 700
700
#0A5EB9
oklch(49.1% 0.161 255.9)
-
Step 800
800
#0F4D95
oklch(42.6% 0.133 255.9)
-
Step 900
900 (this color)
#0A376C
oklch(34.1% 0.104 255.8)
-
Step 950
950
#0E2746
oklch(27.1% 0.066 255.2)
#0A376C 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) | #193C6E | 0.021 |
| Deuteranopia (no green cones) | #00336B | 0.015 |
| Tritanopia (no blue cones) | #00444C | 0.078 |
| Achromatopsia (no color) | #373737 | 0.104 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A376C
#0A376C
oklch(34.1% 0.104 255.8)
- #4D3200
#4D3200
oklch(34.1% 0.072 76)
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 #0A376C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.007
- Marine #042E60 ΔE 0.034
- Prussian Blue #1D3557 ΔE 0.038
- Twilight Blue #0A437A ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.061
- Midnight Green #073B4C ΔE 0.061
- Dark Grey Blue #29465B ΔE 0.069
- Midnight Blue #191970 ΔE 0.075
Use #0A376C 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.