#0B213E
Closest named color: Oxford Blue (#1B263B). oklch(24.8% 0.062 256.3), rgb(11, 33, 62).
Aa
White text reads best on this color (16.13:1).
About this color
#0B213E is a very dark, muted blue. In OKLCH its lightness is 25%, its chroma 0.062 and its hue 256°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.030 away. White text reads best on it, at 16.13:1.
| Hue family | Blues |
| Lightness | very dark (25%) |
| Chroma | muted (0.062) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.30:1 |
| White text | 16.13:1 |
Values
| HEX | #0B213E |
| RGB | rgb(11, 33, 62) |
| HSL | hsl(214, 70%, 14%) |
| OKLCH | oklch(24.8% 0.062 256.3) |
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 #0B213E | 16.13:1 | AAA | Lc -105.5 | Preferred for body text |
| Black text on #0B213E | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #0B213E text on white | 16.13:1 | AAA | Lc 102.9 | Preferred for body text |
| #0B213E text on black | 1.30:1 | 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
#E1EBF8
oklch(93.6% 0.021 254.9)
-
Step 200
200
#C8DBF4
oklch(88.5% 0.04 255.3)
-
Step 300
300
#A2C3F0
oklch(80.9% 0.073 256.2)
-
Step 400
400
#6FA3E9
oklch(70.8% 0.117 256.1)
-
Step 500
500
#478AE2
oklch(63.2% 0.15 256.1)
-
Step 600
600
#2671D0
oklch(55.5% 0.164 256.5)
-
Step 700
700
#185FB4
oklch(49.2% 0.151 256.1)
-
Step 800
800
#174E92
oklch(42.8% 0.126 256.1)
-
Step 900
900
#1A4174
oklch(37.6% 0.098 256.3)
-
Step 950
950 (this color)
#0B213E
oklch(24.8% 0.062 256.3)
#0B213E 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) | #13233F | 0.012 |
| Deuteranopia (no green cones) | #0B1F3D | 0.007 |
| Tritanopia (no blue cones) | #00282C | 0.049 |
| Achromatopsia (no color) | #212121 | 0.062 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B213E
#0B213E
oklch(24.8% 0.062 256.3)
- #2F1D00
#2F1D00
oklch(24.8% 0.052 76.2)
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 #0B213E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.030
- Dark #1B2431 ΔE 0.036
- Rich Black #0D1B2A ΔE 0.040
- Jet #212529 ΔE 0.054
- Navy Blue #001146 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.065
- Marine #042E60 ΔE 0.070
- Gunmetal #293241 ΔE 0.075
Use #0B213E 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.