#0C3E7A
Closest named color: Twilight Blue (#0A437A). oklch(36.9% 0.114 256.2), rgb(12, 62, 122).
Aa
White text reads best on this color (10.57:1).
About this color
#0C3E7A is a dark, moderately saturated blue. In OKLCH its lightness is 37%, its chroma 0.114 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Twilight Blue (#0A437A), ΔE 0.015 away. White text reads best on it, at 10.57:1.
| Hue family | Blues |
| Lightness | dark (37%) |
| Chroma | moderately saturated (0.114) |
| Temperature | cool |
| Nearest name | Twilight Blue (#0A437A) |
| Black text | 1.98:1 |
| White text | 10.57:1 |
Values
| HEX | #0C3E7A |
| RGB | rgb(12, 62, 122) |
| HSL | hsl(213, 82%, 26%) |
| OKLCH | oklch(36.9% 0.114 256.2) |
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 #0C3E7A | 10.57:1 | AAA | Lc -98.1 | Preferred for body text |
| Black text on #0C3E7A | 1.98:1 | Fails | Lc 9.9 | Not readable |
| #0C3E7A text on white | 10.57:1 | AAA | Lc 94.0 | Preferred for body text |
| #0C3E7A text on black | 1.98:1 | Fails | Lc -8.5 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#DFEBFB
oklch(93.6% 0.025 255.6)
-
Step 200
200
#C5DBF9
oklch(88.5% 0.048 256.2)
-
Step 300
300
#9DC3F8
oklch(80.9% 0.086 256.8)
-
Step 400
400
#65A2F4
oklch(70.6% 0.137 256.2)
-
Step 500
500
#3688F0
oklch(63% 0.175 256.1)
-
Step 600
600
#016FDF
oklch(55.6% 0.191 256.2)
-
Step 700
700
#005DBD
oklch(49.1% 0.169 256.1)
-
Step 800
800
#004C9D
oklch(42.8% 0.147 256.2)
-
Step 900
900 (this color)
#0C3E7A
oklch(36.9% 0.114 256.2)
-
Step 950
950
#0B2649
oklch(27% 0.073 256.3)
#0C3E7A 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) | #1C447C | 0.023 |
| Deuteranopia (no green cones) | #003A79 | 0.014 |
| Tritanopia (no blue cones) | #004D56 | 0.087 |
| Achromatopsia (no color) | #3F3F3F | 0.114 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C3E7A
#0C3E7A
oklch(36.9% 0.114 256.2)
- #563900
#563900
oklch(36.9% 0.077 76.9)
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 #0C3E7A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Twilight Blue #0A437A ΔE 0.015
- Marine Blue #01386A ΔE 0.033
- Cobalt #1E488F ΔE 0.047
- Light Navy #155084 ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.062
- Marine #042E60 ΔE 0.064
- Deep Sea Blue #015482 ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.068
Use #0C3E7A 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.