#0B1F3D
Closest named color: Oxford Blue (#1B263B). oklch(24.2% 0.063 258.5), rgb(11, 31, 61).
Aa
White text reads best on this color (16.43:1).
About this color
#0B1F3D is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.063 and its hue 258°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.035 away. White text reads best on it, at 16.43:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.063) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.27:1 |
| White text | 16.43:1 |
Values
| HEX | #0B1F3D |
| RGB | rgb(11, 31, 61) |
| HSL | hsl(216, 69%, 14%) |
| OKLCH | oklch(24.2% 0.063 258.5) |
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 #0B1F3D | 16.43:1 | AAA | Lc -105.7 | Preferred for body text |
| Black text on #0B1F3D | 1.27:1 | Fails | Lc 0.0 | Not readable |
| #0B1F3D text on white | 16.43:1 | AAA | Lc 103.2 | Preferred for body text |
| #0B1F3D text on black | 1.27:1 | 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
#F1F6FC
oklch(97.1% 0.01 252.8)
-
Step 100
100
#E1EBF9
oklch(93.7% 0.022 256.7)
-
Step 200
200
#C9DAF5
oklch(88.4% 0.042 259.6)
-
Step 300
300
#A3C2F1
oklch(80.8% 0.075 258.6)
-
Step 400
400
#71A2EB
oklch(70.8% 0.12 258.1)
-
Step 500
500
#4B88E4
oklch(63% 0.153 258.5)
-
Step 600
600
#2D70D2
oklch(55.6% 0.166 258.4)
-
Step 700
700
#205DB6
oklch(49.1% 0.154 258.5)
-
Step 800
800
#1C4C93
oklch(42.5% 0.128 258.5)
-
Step 900
900
#1D4075
oklch(37.6% 0.1 258.6)
-
Step 950
950 (this color)
#0B1F3D
oklch(24.2% 0.063 258.5)
#0B1F3D 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) | #10223E | 0.012 |
| Deuteranopia (no green cones) | #081D3C | 0.008 |
| Tritanopia (no blue cones) | #00262B | 0.049 |
| Achromatopsia (no color) | #1F1F1F | 0.063 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B1F3D
#0B1F3D
oklch(24.2% 0.063 258.5)
- #2C1C00
#2C1C00
oklch(24.1% 0.05 78.9)
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 #0B1F3D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.035
- Rich Black #0D1B2A ΔE 0.037
- Dark #1B2431 ΔE 0.039
- Navy Blue #001146 ΔE 0.050
- Jet #212529 ΔE 0.058
- Space Cadet #2B2D42 ΔE 0.070
- Dark Indigo #1F0954 ΔE 0.072
- Marine #042E60 ΔE 0.075
Use #0B1F3D 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.