#0A3C6D
Closest named color: Marine Blue (#01386A). oklch(35.4% 0.099 252.7), rgb(10, 60, 109).
Aa
White text reads best on this color (11.16:1).
About this color
#0A3C6D is a dark, moderately saturated blue. In OKLCH its lightness is 35%, its chroma 0.099 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.015 away. White text reads best on it, at 11.16:1.
| Hue family | Blues |
| Lightness | dark (35%) |
| Chroma | moderately saturated (0.099) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.88:1 |
| White text | 11.16:1 |
Values
| HEX | #0A3C6D |
| RGB | rgb(10, 60, 109) |
| HSL | hsl(210, 83%, 23%) |
| OKLCH | oklch(35.4% 0.099 252.7) |
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 #0A3C6D | 11.16:1 | AAA | Lc -99.2 | Preferred for body text |
| Black text on #0A3C6D | 1.88:1 | Fails | Lc 8.5 | Not readable |
| #0A3C6D text on white | 11.16:1 | AAA | Lc 95.4 | Preferred for body text |
| #0A3C6D text on black | 1.88:1 | 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
#E0EBF8
oklch(93.6% 0.021 252.5)
-
Step 200
200
#C6DBF4
oklch(88.4% 0.041 252.8)
-
Step 300
300
#9FC4F0
oklch(80.9% 0.074 253.1)
-
Step 400
400
#68A4E8
oklch(70.6% 0.118 252.6)
-
Step 500
500
#3B8CE2
oklch(63.2% 0.152 252.6)
-
Step 600
600
#0D74D0
oklch(55.7% 0.165 252.6)
-
Step 700
700
#0061B2
oklch(49.2% 0.149 252.5)
-
Step 800
800
#064F91
oklch(42.6% 0.126 252.7)
-
Step 900
900 (this color)
#0A3C6D
oklch(35.4% 0.099 252.7)
-
Step 950
950
#0D2744
oklch(27% 0.063 253.3)
#0A3C6D 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) | #23406F | 0.026 |
| Deuteranopia (no green cones) | #10376C | 0.015 |
| Tritanopia (no blue cones) | #00484F | 0.073 |
| Achromatopsia (no color) | #3B3B3B | 0.099 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A3C6D
#0A3C6D
oklch(35.4% 0.099 252.7)
- #533400
#533400
oklch(35.4% 0.075 72.8)
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 #0A3C6D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.015
- Twilight Blue #0A437A ΔE 0.029
- Prussian Blue #1D3557 ΔE 0.041
- Marine #042E60 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.057
- Dark Grey Blue #29465B ΔE 0.057
- Midnight Green #073B4C ΔE 0.059
- Charcoal #264653 ΔE 0.066
Use #0A3C6D 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.