#0B234D
Closest named color: Oxford Blue (#1B263B). oklch(26.5% 0.083 260.7), rgb(11, 35, 77).
Aa
White text reads best on this color (15.42:1).
About this color
#0B234D is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.083 and its hue 261°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.041 away. White text reads best on it, at 15.42:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.083) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.36:1 |
| White text | 15.42:1 |
Values
| HEX | #0B234D |
| RGB | rgb(11, 35, 77) |
| HSL | hsl(218, 75%, 17%) |
| OKLCH | oklch(26.5% 0.083 260.7) |
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 #0B234D | 15.42:1 | AAA | Lc -104.8 | Preferred for body text |
| Black text on #0B234D | 1.36:1 | Fails | Lc 0.0 | Not readable |
| #0B234D text on white | 15.42:1 | AAA | Lc 102.1 | Preferred for body text |
| #0B234D text on black | 1.36:1 | 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
#F0F6FF
oklch(97.1% 0.014 258.3)
-
Step 100
100
#DFEBFE
oklch(93.7% 0.029 259.6)
-
Step 200
200
#C5DAFE
oklch(88.4% 0.055 261.2)
-
Step 300
300
#9DC2FF
oklch(81% 0.096 260.2)
-
Step 400
400
#679FFF
oklch(70.7% 0.153 260.6)
-
Step 500
500
#3C83FF
oklch(63.2% 0.198 260.7)
-
Step 600
600
#1567F0
oklch(55.5% 0.219 260.8)
-
Step 700
700
#0555D1
oklch(49.1% 0.203 260.7)
-
Step 800
800
#0B46A9
oklch(42.6% 0.169 260.8)
-
Step 900
900
#123D86
oklch(37.8% 0.131 260.5)
-
Step 950
950 (this color)
#0B234D
oklch(26.5% 0.083 260.7)
#0B234D 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) | #0A284F | 0.016 |
| Deuteranopia (no green cones) | #00224C | 0.011 |
| Tritanopia (no blue cones) | #002D34 | 0.064 |
| Achromatopsia (no color) | #252525 | 0.083 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B234D
#0B234D
oklch(26.5% 0.083 260.7)
- #332200
#332200
oklch(26.6% 0.055 80.9)
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 #0B234D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.041
- Marine #042E60 ΔE 0.045
- Dark #1B2431 ΔE 0.056
- Navy Blue #001146 ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.063
- Dark Indigo #1F0954 ΔE 0.064
- Prussian Blue #1D3557 ΔE 0.064
- Rich Black #0D1B2A ΔE 0.068
Use #0B234D 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.