#0B0F2B
Closest named color: Rich Black (#0D1B2A). oklch(18.4% 0.056 273.4), rgb(11, 15, 43).
Aa
White text reads best on this color (18.79:1).
About this color
#0B0F2B is a very dark, muted blue. In OKLCH its lightness is 18%, its chroma 0.056 and its hue 273°. Its hue sits on the cool side of the wheel. The nearest named color is Rich Black (#0D1B2A), ΔE 0.043 away. White text reads best on it, at 18.79:1.
| Hue family | Blues |
| Lightness | very dark (18%) |
| Chroma | muted (0.056) |
| Temperature | cool |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.11:1 |
| White text | 18.79:1 |
Values
| HEX | #0B0F2B |
| RGB | rgb(11, 15, 43) |
| HSL | hsl(233, 59%, 11%) |
| OKLCH | oklch(18.4% 0.056 273.4) |
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 #0B0F2B | 18.79:1 | AAA | Lc -107.2 | Preferred for body text |
| Black text on #0B0F2B | 1.11:1 | Fails | Lc 0.0 | Not readable |
| #0B0F2B text on white | 18.79:1 | AAA | Lc 105.2 | Preferred for body text |
| #0B0F2B text on black | 1.11:1 | 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
#F3F5FC
oklch(97.1% 0.01 273.4)
-
Step 100
100
#E5E9F7
oklch(93.5% 0.019 273.2)
-
Step 200
200
#D1D8F2
oklch(88.5% 0.037 273.7)
-
Step 300
300
#B2BEED
oklch(80.8% 0.068 273.6)
-
Step 400
400
#8B9CE3
oklch(70.8% 0.106 273.1)
-
Step 500
500
#6F81DB
oklch(63% 0.137 273.3)
-
Step 600
600
#5969C9
oklch(55.6% 0.149 273.5)
-
Step 700
700
#4957AE
oklch(49.1% 0.138 273.4)
-
Step 800
800
#3C478D
oklch(42.6% 0.116 273.8)
-
Step 900
900
#333D70
oklch(37.8% 0.088 273.2)
-
Step 950
950 (this color)
#0B0F2B
oklch(18.4% 0.056 273.4)
#0B0F2B 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) | #02132C | 0.018 |
| Deuteranopia (no green cones) | #00102A | 0.020 |
| Tritanopia (no blue cones) | #00151B | 0.047 |
| Achromatopsia (no color) | #121212 | 0.057 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0B0F2B
#0B0F2B
oklch(18.4% 0.056 273.4)
- #181200
#181200
oklch(18.4% 0.038 94.3)
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 #0B0F2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.043
- Rich Navy #001219 ΔE 0.046
- Dark Navy #000435 ΔE 0.047
- Midnight #03012D ΔE 0.052
- Dark Navy Blue #00022E ΔE 0.054
- Navy Blue #001146 ΔE 0.055
- Very Dark Blue #000133 ΔE 0.056
- Almost Black #070D0D ΔE 0.064
Use #0B0F2B 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.