#0C4585
Closest named color: Twilight Blue (#0A437A). oklch(39.4% 0.121 255.4), rgb(12, 69, 133).
Aa
White text reads best on this color (9.52:1).
About this color
#0C4585 is a dark, moderately saturated blue. In OKLCH its lightness is 39%, its chroma 0.121 and its hue 255°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.019 away. White text reads best on it, at 9.52:1.
| Hue family | Blues |
| Lightness | dark (39%) |
| Chroma | moderately saturated (0.121) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 2.20:1 |
| White text | 9.52:1 |
Values
| HEX | #0C4585 |
| RGB | rgb(12, 69, 133) |
| HSL | hsl(212, 83%, 28%) |
| OKLCH | oklch(39.4% 0.121 255.4) |
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 #0C4585 | 9.52:1 | AAA | Lc -95.8 | Preferred for body text |
| Black text on #0C4585 | 2.20:1 | Fails | Lc 12.4 | Not readable |
| #0C4585 text on white | 9.52:1 | AAA | Lc 91.5 | Preferred for body text |
| #0C4585 text on black | 2.20:1 | Fails | Lc -10.9 | 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
#F0F6FE
oklch(97.1% 0.012 255.5)
-
Step 100
100
#DFEBFC
oklch(93.6% 0.026 257)
-
Step 200
200
#C4DBFB
oklch(88.5% 0.051 256.7)
-
Step 300
300
#99C4FB
oklch(81% 0.091 254.9)
-
Step 400
400
#5FA2F9
oklch(70.6% 0.145 255.7)
-
Step 500
500
#2988F6
oklch(63.1% 0.186 255.3)
-
Step 600
600
#0070DC
oklch(55.6% 0.186 255.4)
-
Step 700
700
#005EBA
oklch(49.1% 0.163 255.3)
-
Step 800
800
#004D9A
oklch(42.7% 0.142 255.2)
-
Step 900
900 (this color)
#0C4585
oklch(39.4% 0.121 255.4)
-
Step 950
950
#07264B
oklch(27% 0.077 255.4)
#0C4585 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) | #214B87 | 0.025 |
| Deuteranopia (no green cones) | #004184 | 0.014 |
| Tritanopia (no blue cones) | #00545E | 0.090 |
| Achromatopsia (no color) | #454545 | 0.121 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C4585
#0C4585
oklch(39.4% 0.121 255.4)
- #603F00
#603F00
oklch(39.6% 0.083 75.5)
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 #0C4585, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.019
- Cobalt #1E488F ΔE 0.023
- Light Navy #155084 ΔE 0.034
- Deep Sea Blue #015482 ΔE 0.046
- Dusk Blue #26538D ΔE 0.049
- Marine Blue #01386A ΔE 0.059
- Dark Slate Blue #483D8B ΔE 0.068
- Blueberry #464196 ΔE 0.069
Use #0C4585 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.