#0B283C
Closest named color: Oxford Blue (#1B263B). oklch(26.6% 0.051 242.4), rgb(11, 40, 60).
Aa
White text reads best on this color (15.18:1).
About this color
#0B283C is a dark, muted blue. In OKLCH its lightness is 27%, its chroma 0.051 and its hue 242°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.019 away. White text reads best on it, at 15.18:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | muted (0.051) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.38:1 |
| White text | 15.18:1 |
Values
| HEX | #0B283C |
| RGB | rgb(11, 40, 60) |
| HSL | hsl(204, 69%, 14%) |
| OKLCH | oklch(26.6% 0.051 242.4) |
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 #0B283C | 15.18:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #0B283C | 1.38:1 | Fails | Lc 0.0 | Not readable |
| #0B283C text on white | 15.18:1 | AAA | Lc 101.9 | Preferred for body text |
| #0B283C text on black | 1.38:1 | 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
#F1F6FA
oklch(97.1% 0.008 241.7)
-
Step 100
100
#E0ECF5
oklch(93.7% 0.018 240)
-
Step 200
200
#C7DCEE
oklch(88.4% 0.034 244)
-
Step 300
300
#9FC6E5
oklch(80.9% 0.061 242.5)
-
Step 400
400
#68A8D8
oklch(70.7% 0.097 242.3)
-
Step 500
500
#3991CD
oklch(63.1% 0.123 242.3)
-
Step 600
600
#007ABA
oklch(55.6% 0.133 242.5)
-
Step 700
700
#00669D
oklch(49% 0.118 242.7)
-
Step 800
800
#005482
oklch(42.8% 0.102 242.4)
-
Step 900
900
#104668
oklch(37.8% 0.079 241.8)
-
Step 950
950 (this color)
#0B283C
oklch(26.6% 0.051 242.4)
#0B283C 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) | #1F283D | 0.025 |
| Deuteranopia (no green cones) | #18243C | 0.019 |
| Tritanopia (no blue cones) | #002D2F | 0.036 |
| Achromatopsia (no color) | #262626 | 0.051 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B283C
#0B283C
oklch(26.6% 0.051 242.4)
- #371F08
#371F08
oklch(26.6% 0.051 61.2)
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 #0B283C, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.019
- Dark #1B2431 ΔE 0.026
- Jet #212529 ΔE 0.042
- Space Cadet #2B2D42 ΔE 0.050
- Rich Black #0D1B2A ΔE 0.051
- Gunmetal #293241 ΔE 0.055
- Midnight Green #073B4C ΔE 0.065
- Prussian Blue #1D3557 ΔE 0.066
Use #0B283C 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.