#0B213A
Closest named color: Oxford Blue (#1B263B). oklch(24.5% 0.055 253.5), rgb(11, 33, 58).
Aa
White text reads best on this color (16.24:1).
About this color
#0B213A is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.055 and its hue 253°. Its hue sits on the cool side of the wheel. The nearest named color is Oxford Blue (#1B263B), ΔE 0.029 away. White text reads best on it, at 16.24:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.055) |
| Temperature | cool |
| Nearest name | Oxford Blue (#1B263B) |
| Black text | 1.29:1 |
| White text | 16.24:1 |
Values
| HEX | #0B213A |
| RGB | rgb(11, 33, 58) |
| HSL | hsl(212, 68%, 14%) |
| OKLCH | oklch(24.5% 0.055 253.5) |
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 #0B213A | 16.24:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #0B213A | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #0B213A text on white | 16.24:1 | AAA | Lc 103.0 | Preferred for body text |
| #0B213A 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
#F1F6FB
oklch(97.1% 0.009 247.9)
-
Step 100
100
#E1EBF7
oklch(93.6% 0.019 252.9)
-
Step 200
200
#C9DBF1
oklch(88.5% 0.036 253.5)
-
Step 300
300
#A3C4EB
oklch(81% 0.066 252.8)
-
Step 400
400
#71A4E1
oklch(70.7% 0.105 253.6)
-
Step 500
500
#498CD8
oklch(63.1% 0.134 253.2)
-
Step 600
600
#2974C6
oklch(55.6% 0.147 253.7)
-
Step 700
700
#1B61AB
oklch(49.1% 0.136 253.6)
-
Step 800
800
#19508A
oklch(42.8% 0.112 253)
-
Step 900
900
#1C436F
oklch(37.9% 0.088 253.4)
-
Step 950
950 (this color)
#0B213A
oklch(24.5% 0.055 253.5)
#0B213A 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) | #16233B | 0.016 |
| Deuteranopia (no green cones) | #0F1E39 | 0.010 |
| Tritanopia (no blue cones) | #00272A | 0.044 |
| Achromatopsia (no color) | #202020 | 0.055 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B213A
#0B213A
oklch(24.5% 0.055 253.5)
- #2F1C00
#2F1C00
oklch(24.5% 0.052 73.9)
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 #0B213A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Oxford Blue #1B263B ΔE 0.029
- Dark #1B2431 ΔE 0.031
- Rich Black #0D1B2A ΔE 0.034
- Jet #212529 ΔE 0.049
- Navy Blue #001146 ΔE 0.059
- Space Cadet #2B2D42 ΔE 0.066
- Gunmetal #293241 ΔE 0.075
- Marine #042E60 ΔE 0.076
Use #0B213A 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.