#0B1F5A
Closest named color: Midnight Blue (#191970). oklch(26.8% 0.109 265.2), rgb(11, 31, 90).
Aa
White text reads best on this color (15.46:1).
About this color
#0B1F5A is a dark, moderately saturated blue. In OKLCH its lightness is 27%, its chroma 0.109 and its hue 265°. Its hue sits on the cool side of the wheel. The nearest named color is Midnight Blue (#191970), ΔE 0.043 away. White text reads best on it, at 15.46:1.
| Hue family | Blues |
| Lightness | dark (27%) |
| Chroma | moderately saturated (0.109) |
| Temperature | cool |
| Nearest name | Midnight Blue (#191970) |
| Black text | 1.35:1 |
| White text | 15.46:1 |
Values
| HEX | #0B1F5A |
| RGB | rgb(11, 31, 90) |
| HSL | hsl(225, 78%, 20%) |
| OKLCH | oklch(26.8% 0.109 265.2) |
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 #0B1F5A | 15.46:1 | AAA | Lc -104.7 | Preferred for body text |
| Black text on #0B1F5A | 1.35:1 | Fails | Lc 0.0 | Not readable |
| #0B1F5A text on white | 15.46:1 | AAA | Lc 102.0 | Preferred for body text |
| #0B1F5A text on black | 1.35:1 | 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
#F1F6FF
oklch(97.2% 0.013 262.4)
-
Step 100
100
#E0EAFF
oklch(93.6% 0.03 265.3)
-
Step 200
200
#C7D9FF
oklch(88.4% 0.056 265.2)
-
Step 300
300
#A3C0FF
oklch(80.9% 0.095 265.2)
-
Step 400
400
#729CFF
oklch(70.6% 0.153 265.4)
-
Step 500
500
#4E7FFF
oklch(63% 0.198 265.3)
-
Step 600
600
#2B5EFF
oklch(55.6% 0.244 265.2)
-
Step 700
700
#163FF4
oklch(49.1% 0.267 265.2)
-
Step 800
800
#1237C5
oklch(42.7% 0.221 265.1)
-
Step 900
900
#13339B
oklch(37.7% 0.173 265.1)
-
Step 950
950 (this color)
#0B1F5A
oklch(26.8% 0.109 265.2)
#0B1F5A 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) | #00285C | 0.025 |
| Deuteranopia (no green cones) | #002159 | 0.010 |
| Tritanopia (no blue cones) | #002E39 | 0.084 |
| Achromatopsia (no color) | #242424 | 0.109 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B1F5A
#0B1F5A
oklch(26.8% 0.109 265.2)
- #322300
#322300
oklch(26.7% 0.055 84.6)
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 #0B1F5A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Midnight Blue #191970 ΔE 0.043
- Marine #042E60 ΔE 0.043
- Darkblue #030764 ΔE 0.052
- Dark Indigo #1F0954 ΔE 0.053
- Dark Royal Blue #02066F ΔE 0.058
- Navy Blue #001146 ΔE 0.058
- Deep Blue #040273 ΔE 0.064
- Oxford Blue #1B263B ΔE 0.067
Use #0B1F5A 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.