#0B3153
Closest named color: Prussian Blue (#1D3557). oklch(30.7% 0.074 249.8), rgb(11, 49, 83).
Aa
White text reads best on this color (13.30:1).
About this color
#0B3153 is a dark, moderately saturated blue. In OKLCH its lightness is 31%, 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 0.024 away. White text reads best on it, at 13.30:1.
| Hue family | Blues |
| Lightness | dark (31%) |
| Chroma | moderately saturated (0.074) |
| Temperature | cool |
| Nearest name | Prussian Blue (#1D3557) |
| Black text | 1.57:1 |
| White text | 13.30:1 |
Values
| HEX | #0B3153 |
| RGB | rgb(11, 49, 83) |
| HSL | hsl(208, 77%, 18%) |
| OKLCH | oklch(30.7% 0.074 249.8) |
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 #0B3153 | 13.30:1 | AAA | Lc -102.6 | Preferred for body text |
| Black text on #0B3153 | 1.57:1 | Fails | Lc 0.0 | Not readable |
| #0B3153 text on white | 13.30:1 | AAA | Lc 99.4 | Preferred for body text |
| #0B3153 text on black | 1.57:1 | 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
#C1DCF9
oklch(88.4% 0.049 250.3)
-
Step 300
300
#95C5F8
oklch(80.8% 0.089 250.5)
-
Step 400
400
#54A6F4
oklch(70.8% 0.14 249.4)
-
Step 500
500
#008CEF
oklch(63% 0.178 249.9)
-
Step 600
600
#0076CA
oklch(55.7% 0.156 249.7)
-
Step 700
700
#0063AB
oklch(49.2% 0.138 249.7)
-
Step 800
800
#00518D
oklch(42.7% 0.12 249.5)
-
Step 900
900
#004377
oklch(37.7% 0.106 249.9)
-
Step 950
950 (this color)
#0B3153
oklch(30.7% 0.074 249.8)
#0B3153 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) | #213354 | 0.024 |
| Deuteranopia (no green cones) | #162C52 | 0.017 |
| Tritanopia (no blue cones) | #00393E | 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°).
- #0B3153
#0B3153
oklch(30.7% 0.074 249.8)
- #442800
#442800
oklch(30.5% 0.066 69.7)
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 #0B3153, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Prussian Blue #1D3557 ΔE 0.024
- Marine #042E60 ΔE 0.027
- Midnight Green #073B4C ΔE 0.039
- Marine Blue #01386A ΔE 0.043
- Dark Blue Grey #1F3B4D ΔE 0.044
- Space Cadet #2B2D42 ΔE 0.045
- Gunmetal #293241 ΔE 0.046
- Oxford Blue #1B263B ΔE 0.051
Use #0B3153 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.