#0D377D
Closest named color: Marine Blue (#01386A). oklch(35.5% 0.128 260.4), rgb(13, 55, 125).
Aa
White text reads best on this color (11.29:1).
About this color
#0D377D is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.128 and its hue 260°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.034 away. White text reads best on it, at 11.29:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.128) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.85:1 |
| White text | 11.29:1 |
Values
| HEX | #0D377D |
| RGB | rgb(13, 55, 125) |
| HSL | hsl(218, 81%, 27%) |
| OKLCH | oklch(35.5% 0.128 260.4) |
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 #0D377D | 11.29:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #0D377D | 1.85:1 | Fails | Lc 8.4 | Not readable |
| #0D377D text on white | 11.29:1 | AAA | Lc 95.5 | Preferred for body text |
| #0D377D text on black | 1.85:1 | 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
#F1F6FE
oklch(97.2% 0.012 259.8)
-
Step 100
100
#DFEBFD
oklch(93.6% 0.028 258.4)
-
Step 200
200
#C5DAFD
oklch(88.4% 0.054 260.6)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#679FFF
oklch(70.7% 0.153 260.6)
-
Step 500
500
#3C83FD
oklch(63% 0.196 260.5)
-
Step 600
600
#1769EC
oklch(55.6% 0.212 260.3)
-
Step 700
700
#0856CE
oklch(49.1% 0.198 260.4)
-
Step 800
800
#0D47A6
oklch(42.6% 0.164 260.5)
-
Step 900
900 (this color)
#0D377D
oklch(35.5% 0.128 260.4)
-
Step 950
950
#0D254D
oklch(27.1% 0.08 260.1)
#0D377D 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) | #00407F | 0.025 |
| Deuteranopia (no green cones) | #00367C | 0.008 |
| Tritanopia (no blue cones) | #004854 | 0.097 |
| Achromatopsia (no color) | #3A3A3A | 0.128 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D377D
#0D377D
oklch(35.5% 0.128 260.4)
- #503700
#503700
oklch(35.6% 0.074 80.3)
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 #0D377D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.034
- Twilight Blue #0A437A ΔE 0.035
- Marine #042E60 ΔE 0.057
- Cobalt #1E488F ΔE 0.059
- Prussian Blue #1D3557 ΔE 0.066
- Light Navy #155084 ΔE 0.074
- Royal #0C1793 ΔE 0.074
- Midnight Blue #191970 ΔE 0.075
Use #0D377D 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.