#0A4166
Closest named color: Marine Blue (#01386A). oklch(36.2% 0.083 244.5), rgb(10, 65, 102).
Aa
White text reads best on this color (10.70:1).
About this color
#0A4166 is a dark, moderately saturated blue. In OKLCH its lightness is 36%, its chroma 0.083 and its hue 244°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.032 away. White text reads best on it, at 10.70:1.
| Hue family | Blues |
| Lightness | dark (36%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.96:1 |
| White text | 10.70:1 |
Values
| HEX | #0A4166 |
| RGB | rgb(10, 65, 102) |
| HSL | hsl(204, 82%, 22%) |
| OKLCH | oklch(36.2% 0.083 244.5) |
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 #0A4166 | 10.70:1 | AAA | Lc -98.4 | Preferred for body text |
| Black text on #0A4166 | 1.96:1 | Fails | Lc 9.5 | Not readable |
| #0A4166 text on white | 10.70:1 | AAA | Lc 94.4 | Preferred for body text |
| #0A4166 text on black | 1.96:1 | Fails | Lc -8.1 | 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
#E0EBF5
oklch(93.5% 0.018 245.4)
-
Step 200
200
#C7DCEF
oklch(88.5% 0.035 245.5)
-
Step 300
300
#9FC6E7
oklch(81% 0.063 244.2)
-
Step 400
400
#68A7DB
oklch(70.7% 0.1 244.8)
-
Step 500
500
#3990D1
oklch(63.1% 0.128 244.7)
-
Step 600
600
#0079BE
oklch(55.6% 0.139 244.6)
-
Step 700
700
#0066A0
oklch(49.2% 0.121 244)
-
Step 800
800
#005385
oklch(42.7% 0.107 244.8)
-
Step 900
900 (this color)
#0A4166
oklch(36.2% 0.083 244.5)
-
Step 950
950
#0C293E
oklch(27.1% 0.052 243.5)
#0A4166 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) | #2F4268 | 0.035 |
| Deuteranopia (no green cones) | #223A65 | 0.026 |
| Tritanopia (no blue cones) | #004A4E | 0.058 |
| Achromatopsia (no color) | #3E3E3E | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A4166
#0A4166
oklch(36.2% 0.083 244.5)
- #5A3300
#5A3300
oklch(36.2% 0.081 65.1)
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 #0A4166, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.032
- Twilight Blue #0A437A ΔE 0.034
- Dark Grey Blue #29465B ΔE 0.038
- Prussian Blue #1D3557 ΔE 0.041
- Dark Blue Grey #1F3B4D ΔE 0.044
- Charcoal #264653 ΔE 0.046
- Midnight Green #073B4C ΔE 0.047
- Marine #042E60 ΔE 0.060
Use #0A4166 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.