#0C283F
Closest named color: Oxford Blue (#1B263B). oklch(26.8% 0.055 246.6), rgb(12, 40, 63).
Aa
White text reads best on this color (15.09:1).
About this color
#0C283F is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.055 and its hue 247°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.018 away. White text reads best on it, at 15.09:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.39:1 |
| White text | 15.09:1 |
Values
| HEX | #0C283F |
| RGB | rgb(12, 40, 63) |
| HSL | hsl(207, 68%, 15%) |
| OKLCH | oklch(26.8% 0.055 246.6) |
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 #0C283F | 15.09:1 | AAA | Lc -104.6 | Preferred for body text |
| Black text on #0C283F | 1.39:1 | Fails | Lc 0.0 | Not readable |
| #0C283F text on white | 15.09:1 | AAA | Lc 101.8 | Preferred for body text |
| #0C283F text on black | 1.39:1 | 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 950.
-
Step 50
50
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E0EBF6
oklch(93.5% 0.019 248)
-
Step 200
200
#C7DCF0
oklch(88.5% 0.036 246.9)
-
Step 300
300
#9FC5E9
oklch(80.8% 0.065 247.2)
-
Step 400
400
#69A7DD
oklch(70.8% 0.102 246.2)
-
Step 500
500
#3A8FD4
oklch(63% 0.132 246.6)
-
Step 600
600
#0478C2
oklch(55.6% 0.144 246.7)
-
Step 700
700
#0065A4
oklch(49.2% 0.127 246.3)
-
Step 800
800
#015287
oklch(42.6% 0.11 246.6)
-
Step 900
900
#11456C
oklch(37.8% 0.085 246)
-
Step 950
950 (this color)
#0C283F
oklch(26.8% 0.055 246.6)
#0C283F 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) | #1E2940 | 0.023 |
| Deuteranopia (no green cones) | #16243F | 0.016 |
| Tritanopia (no blue cones) | #002E30 | 0.041 |
| Achromatopsia (no color) | #262626 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0C283F
#0C283F
oklch(26.8% 0.055 246.6)
- #382004
#382004
oklch(26.9% 0.055 66)
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 #0C283F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.018
- Dark #1B2431 ΔE 0.030
- Jet #212529 ΔE 0.046
- Space Cadet #2B2D42 ΔE 0.048
- Gunmetal #293241 ΔE 0.054
- Rich Black #0D1B2A ΔE 0.054
- Marine #042E60 ΔE 0.060
- Prussian Blue #1D3557 ΔE 0.062
Use #0C283F 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.