#0B2040
Closest named color: Oxford Blue (#1B263B). oklch(24.7% 0.067 258.7), rgb(11, 32, 64).
Aa
White text reads best on this color (16.21:1).
About this color
#0B2040 is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.067 and its hue 259°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.033 away. White text reads best on it, at 16.21:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.067) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.21:1 |
Values
| HEX | #0B2040 |
| RGB | rgb(11, 32, 64) |
| HSL | hsl(216, 71%, 15%) |
| OKLCH | oklch(24.7% 0.067 258.7) |
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 #0B2040 | 16.21:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #0B2040 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #0B2040 text on white | 16.21:1 | AAA | Lc 103.0 | Preferred for body text |
| #0B2040 text on black | 1.29:1 | 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
#F1F6FD
oklch(97.1% 0.011 256.7)
-
Step 100
100
#E1EBFA
oklch(93.7% 0.023 258.4)
-
Step 200
200
#C8DBF7
oklch(88.6% 0.044 258)
-
Step 300
300
#A2C2F4
oklch(80.8% 0.079 259.2)
-
Step 400
400
#6FA1EF
oklch(70.7% 0.127 259)
-
Step 500
500
#4888E9
oklch(63.2% 0.16 258.6)
-
Step 600
600
#286FD7
oklch(55.6% 0.175 258.6)
-
Step 700
700
#1B5CBB
oklch(49.1% 0.163 258.8)
-
Step 800
800
#194C97
oklch(42.8% 0.134 258.6)
-
Step 900
900
#1B4078
oklch(37.7% 0.105 258.7)
-
Step 950
950 (this color)
#0B2040
oklch(24.7% 0.067 258.7)
#0B2040 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) | #102341 | 0.012 |
| Deuteranopia (no green cones) | #061E3F | 0.009 |
| Tritanopia (no blue cones) | #00272C | 0.052 |
| Achromatopsia (no color) | #202020 | 0.067 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B2040
#0B2040
oklch(24.7% 0.067 258.7)
- #2E1D00
#2E1D00
oklch(24.6% 0.051 77.8)
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 #0B2040, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.033
- Dark #1B2431 ΔE 0.040
- Rich Black #0D1B2A ΔE 0.043
- Navy Blue #001146 ΔE 0.051
- Jet #212529 ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.067
- Marine #042E60 ΔE 0.069
- Dark Indigo #1F0954 ΔE 0.070
Use #0B2040 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.