#0B3052
Closest named color: Prussian Blue (#1D3557). oklch(30.3% 0.074 250.3), rgb(11, 48, 82).
Aa
White text reads best on this color (13.47:1).
About this color
#0B3052 is a dark, moderately saturated blue. In OKLCH its lightness is 30%, its chroma 0.074 and its hue 250°. Its hue sits on the cool side of the wheel. The nearest named color is Prussian Blue (#1D3557), ΔE 0.027 away. White text reads best on it, at 13.47:1.
| Hue family | Blues |
| Lightness | dark (30%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.55:1 |
| White text | 13.47:1 |
Values
| HEX | #0B3052 |
| RGB | rgb(11, 48, 82) |
| HSL | hsl(209, 76%, 18%) |
| OKLCH | oklch(30.3% 0.074 250.3) |
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 #0B3052 | 13.47:1 | AAA | Lc -102.8 | Preferred for body text |
| Black text on #0B3052 | 1.55:1 | Fails | Lc 0.0 | Not readable |
| #0B3052 text on white | 13.47:1 | AAA | Lc 99.7 | Preferred for body text |
| #0B3052 text on black | 1.55:1 | 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
#F0F6FD
oklch(97.1% 0.011 252.1)
-
Step 100
100
#DEECFB
oklch(93.7% 0.025 250)
-
Step 200
200
#C2DCF9
oklch(88.5% 0.049 251.2)
-
Step 300
300
#96C5F8
oklch(80.9% 0.088 251)
-
Step 400
400
#56A5F4
oklch(70.6% 0.14 250.4)
-
Step 500
500
#048CF0
oklch(63.1% 0.179 250.3)
-
Step 600
600
#0075CB
oklch(55.5% 0.159 250.4)
-
Step 700
700
#0063AC
oklch(49.2% 0.139 250)
-
Step 800
800
#00508E
oklch(42.6% 0.122 250.5)
-
Step 900
900
#004378
oklch(37.8% 0.108 250.3)
-
Step 950
950 (this color)
#0B3052
oklch(30.3% 0.074 250.3)
#0B3052 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) | #203253 | 0.023 |
| Deuteranopia (no green cones) | #152C51 | 0.014 |
| Tritanopia (no blue cones) | #00383D | 0.053 |
| Achromatopsia (no color) | #2F2F2F | 0.074 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B3052
#0B3052
oklch(30.3% 0.074 250.3)
- #432800
#432800
oklch(30.4% 0.065 70.9)
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 #0B3052, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.027
- Marine #042E60 ΔE 0.027
- Midnight Green #073B4C ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.045
- Marine Blue #01386A ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.046
- Gunmetal #293241 ΔE 0.047
- Oxford Blue #1B263B ΔE 0.048
Use #0B3052 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.