#0B1F4F
Closest named color: Navy Blue (#001146). oklch(25.7% 0.092 263.9), rgb(11, 31, 79).
Aa
White text reads best on this color (15.87:1).
About this color
#0B1F4F is a dark, moderately saturated blue. In OKLCH its lightness is 26%, its chroma 0.092 and its hue 264°. Its hue sits on the cool side of the wheel. The nearest named color is Navy Blue (#001146), ΔE 0.048 away. White text reads best on it, at 15.87:1.
| Hue family | Blues |
| Lightness | dark (26%) |
| Chroma | moderately saturated (0.092) |
| Temperature | cool |
| Nearest name | Navy Blue (#001146) |
| Black text | 1.32:1 |
| White text | 15.87:1 |
Values
| HEX | #0B1F4F |
| RGB | rgb(11, 31, 79) |
| HSL | hsl(222, 76%, 18%) |
| OKLCH | oklch(25.7% 0.092 263.9) |
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 #0B1F4F | 15.87:1 | AAA | Lc -105.2 | Preferred for body text |
| Black text on #0B1F4F | 1.32:1 | Fails | Lc 0.0 | Not readable |
| #0B1F4F text on white | 15.87:1 | AAA | Lc 102.5 | Preferred for body text |
| #0B1F4F text on black | 1.32:1 | 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
#C7DAFF
oklch(88.6% 0.055 263.7)
-
Step 300
300
#A1C0FF
oklch(80.8% 0.096 264.1)
-
Step 400
400
#6F9DFF
oklch(70.7% 0.152 263.9)
-
Step 500
500
#4980FF
oklch(63% 0.198 264)
-
Step 600
600
#2360FE
oklch(55.6% 0.243 263.9)
-
Step 700
700
#184DDE
oklch(49.1% 0.227 264)
-
Step 800
800
#1541B3
oklch(42.7% 0.187 263.9)
-
Step 900
900
#17398D
oklch(37.7% 0.145 264)
-
Step 950
950 (this color)
#0B1F4F
oklch(25.7% 0.092 263.9)
#0B1F4F 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) | #002551 | 0.018 |
| Deuteranopia (no green cones) | #001F4E | 0.011 |
| Tritanopia (no blue cones) | #002B33 | 0.073 |
| Achromatopsia (no color) | #222222 | 0.092 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B1F4F
#0B1F4F
oklch(25.7% 0.092 263.9)
- #2F2100
#2F2100
oklch(25.8% 0.053 85.2)
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 #0B1F4F, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Navy Blue #001146 ΔE 0.048
- Oxford Blue #1B263B ΔE 0.051
- Marine #042E60 ΔE 0.052
- Dark Indigo #1F0954 ΔE 0.054
- Darkblue #030764 ΔE 0.062
- Midnight Blue #191970 ΔE 0.063
- Dark #1B2431 ΔE 0.065
- Rich Black #0D1B2A ΔE 0.070
Use #0B1F4F 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.