#0A395F
Closest named color: Marine Blue (#01386A). oklch(33.6% 0.082 248.3), rgb(10, 57, 95).
Aa
White text reads best on this color (11.90:1).
About this color
#0A395F is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.082 and its hue 248°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.020 away. White text reads best on it, at 11.90:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.082) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.76:1 |
| White text | 11.90:1 |
Values
| HEX | #0A395F |
| RGB | rgb(10, 57, 95) |
| HSL | hsl(207, 81%, 21%) |
| OKLCH | oklch(33.6% 0.082 248.3) |
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 #0A395F | 11.90:1 | AAA | Lc -100.5 | Preferred for body text |
| Black text on #0A395F | 1.76:1 | Fails | Lc 0.0 | Not readable |
| #0A395F text on white | 11.90:1 | AAA | Lc 96.9 | Preferred for body text |
| #0A395F 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF6
oklch(93.6% 0.018 250.6)
-
Step 200
200
#C8DCEF
oklch(88.5% 0.034 246.8)
-
Step 300
300
#A2C5E7
oklch(80.9% 0.061 247.8)
-
Step 400
400
#6EA6DC
oklch(70.8% 0.099 248.5)
-
Step 500
500
#438ED2
oklch(63% 0.127 248.5)
-
Step 600
600
#1E77BF
oklch(55.6% 0.137 248.5)
-
Step 700
700
#0D64A5
oklch(49.1% 0.128 248.3)
-
Step 800
800
#115286
oklch(42.8% 0.106 248.3)
-
Step 900
900 (this color)
#0A395F
oklch(33.6% 0.082 248.3)
-
Step 950
950
#0F283F
oklch(27% 0.053 248.7)
#0A395F 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) | #273B61 | 0.029 |
| Deuteranopia (no green cones) | #1A345E | 0.018 |
| Tritanopia (no blue cones) | #004247 | 0.059 |
| Achromatopsia (no color) | #373737 | 0.082 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A395F
#0A395F
oklch(33.6% 0.082 248.3)
- #4F2E00
#4F2E00
oklch(33.5% 0.074 67.9)
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 #0A395F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.020
- Prussian Blue #1D3557 ΔE 0.021
- Marine #042E60 ΔE 0.036
- Midnight Green #073B4C ΔE 0.037
- Dark Blue Grey #1F3B4D ΔE 0.038
- Twilight Blue #0A437A ΔE 0.052
- Dark Grey Blue #29465B ΔE 0.056
- Gunmetal #293241 ΔE 0.058
Use #0A395F 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.