#0B2233
Closest named color: Dark (#1B2431). oklch(24.3% 0.044 243.4), rgb(11, 34, 51).
Aa
White text reads best on this color (16.26:1).
About this color
#0B2233 is a very dark, muted blue. In OKLCH its lightness is 24%, its chroma 0.044 and its hue 243°. Its hue sits on the cool side of the wheel. The nearest named color is Dark (#1B2431), ΔE 0.023 away. White text reads best on it, at 16.26:1.
| Hue family | Blues |
| Lightness | very dark (24%) |
| Chroma | muted (0.044) |
| Temperature | cool |
| Nearest name | Dark (#1B2431) |
| Black text | 1.29:1 |
| White text | 16.26:1 |
Values
| HEX | #0B2233 |
| RGB | rgb(11, 34, 51) |
| HSL | hsl(206, 65%, 12%) |
| OKLCH | oklch(24.3% 0.044 243.4) |
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 #0B2233 | 16.26:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #0B2233 | 1.29:1 | Fails | Lc 0.0 | Not readable |
| #0B2233 text on white | 16.26:1 | AAA | Lc 103.1 | Preferred for body text |
| #0B2233 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
#F2F6FA
oklch(97.1% 0.007 247.9)
-
Step 100
100
#E2EBF3
oklch(93.6% 0.015 244.7)
-
Step 200
200
#CADCEB
oklch(88.6% 0.028 243.1)
-
Step 300
300
#A5C5E0
oklch(80.9% 0.052 243.9)
-
Step 400
400
#73A7D0
oklch(70.7% 0.082 243)
-
Step 500
500
#4B90C4
oklch(63.1% 0.105 243.3)
-
Step 600
600
#2A79B1
oklch(55.5% 0.115 243.9)
-
Step 700
700
#1B6698
oklch(49.1% 0.107 243.3)
-
Step 800
800
#1A537B
oklch(42.6% 0.088 243.6)
-
Step 900
900
#1C4563
oklch(37.6% 0.069 243.3)
-
Step 950
950 (this color)
#0B2233
oklch(24.3% 0.044 243.4)
#0B2233 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) | #1A2234 | 0.020 |
| Deuteranopia (no green cones) | #151E33 | 0.017 |
| Tritanopia (no blue cones) | #002628 | 0.031 |
| Achromatopsia (no color) | #202020 | 0.044 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B2233
#0B2233
oklch(24.3% 0.044 243.4)
- #2E1B08
#2E1B08
oklch(24.3% 0.043 63.4)
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 #0B2233, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.023
- Rich Black #0D1B2A ΔE 0.027
- Oxford Blue #1B263B ΔE 0.030
- Jet #212529 ΔE 0.039
- Space Cadet #2B2D42 ΔE 0.067
- Navy Blue #001146 ΔE 0.071
- Gunmetal #293241 ΔE 0.075
- Rich Navy #001219 ΔE 0.076
Use #0B2233 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.