#0C3178
Closest named color: Marine Blue (#01386A). oklch(33.7% 0.129 261.8), rgb(12, 49, 120).
Aa
White text reads best on this color (12.16:1).
About this color
#0C3178 is a dark, moderately saturated blue. In OKLCH its lightness is 34%, its chroma 0.129 and its hue 262°. Its hue sits on the cool side of the wheel. The nearest named color is Marine Blue (#01386A), ΔE 0.033 away. White text reads best on it, at 12.16:1.
| Hue family | Blues |
| Lightness | dark (34%) |
| Chroma | moderately saturated (0.129) |
| Temperature | cool |
| Nearest name | Marine Blue (#01386A) |
| Black text | 1.72:1 |
| White text | 12.16:1 |
Values
| HEX | #0C3178 |
| RGB | rgb(12, 49, 120) |
| HSL | hsl(219, 82%, 26%) |
| OKLCH | oklch(33.7% 0.129 261.8) |
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 #0C3178 | 12.16:1 | AAA | Lc -100.8 | Preferred for body text |
| Black text on #0C3178 | 1.72:1 | Fails | Lc 0.0 | Not readable |
| #0C3178 text on white | 12.16:1 | AAA | Lc 97.2 | Preferred for body text |
| #0C3178 text on black | 1.72:1 | 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
#E0EAFD
oklch(93.5% 0.028 263.4)
-
Step 200
200
#C6DAFD
oklch(88.5% 0.053 261.7)
-
Step 300
300
#9FC1FF
oklch(80.9% 0.096 262.2)
-
Step 400
400
#6A9EFF
oklch(70.6% 0.153 261.9)
-
Step 500
500
#4182FE
oklch(63.1% 0.197 261.7)
-
Step 600
600
#2167EE
oklch(55.5% 0.215 261.8)
-
Step 700
700
#1455CF
oklch(49.1% 0.199 261.7)
-
Step 800
800
#1446A7
oklch(42.6% 0.165 261.9)
-
Step 900
900 (this color)
#0C3178
oklch(33.7% 0.129 261.8)
-
Step 950
950
#0E244D
oklch(26.9% 0.081 261.5)
#0C3178 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) | #003B7A | 0.027 |
| Deuteranopia (no green cones) | #003177 | 0.007 |
| Tritanopia (no blue cones) | #00434F | 0.099 |
| Achromatopsia (no color) | #363636 | 0.129 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C3178
#0C3178
oklch(33.7% 0.129 261.8)
- #493300
#493300
oklch(33.8% 0.07 82.1)
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 #0C3178, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Marine Blue #01386A ΔE 0.033
- Marine #042E60 ΔE 0.043
- Twilight Blue #0A437A ΔE 0.052
- Midnight Blue #191970 ΔE 0.058
- Prussian Blue #1D3557 ΔE 0.062
- Royal #0C1793 ΔE 0.067
- Cobalt #1E488F ΔE 0.077
- Dark Blue #00008B ΔE 0.087
Use #0C3178 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.