#0D1B2A
Named color: Rich Black. oklch(21.8% 0.036 251.3), rgb(13, 27, 42).
Aa
White text reads best on this color (17.39:1).
About this color
#0D1B2A is a very dark, muted blue. In OKLCH its lightness is 22%, its chroma 0.036 and its hue 251°. Its hue sits on the cool side of the wheel. It is the named color Rich Black. White text reads best on it, at 17.39:1.
| Hue family | Blues |
| Lightness | very dark (22%) |
| Chroma | muted (0.036) |
| Temperature | cool |
| Nearest name | Rich Black |
| Black text | 1.20:1 |
| White text | 17.39:1 |
Values
| HEX | #0D1B2A |
| RGB | rgb(13, 27, 42) |
| HSL | hsl(211, 53%, 11%) |
| OKLCH | oklch(21.8% 0.036 251.3) |
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 #0D1B2A | 17.39:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #0D1B2A | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #0D1B2A text on white | 17.39:1 | AAA | Lc 104.2 | Preferred for body text |
| #0D1B2A text on black | 1.20:1 | 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
#F3F6F9
oklch(97.2% 0.005 247.9)
-
Step 100
100
#E4EBF2
oklch(93.7% 0.012 248)
-
Step 200
200
#CEDBE9
oklch(88.6% 0.024 250.1)
-
Step 300
300
#ADC3DC
oklch(80.9% 0.043 251.7)
-
Step 400
400
#82A4CA
oklch(70.7% 0.067 251.6)
-
Step 500
500
#628DBC
oklch(63.1% 0.086 251.4)
-
Step 600
600
#4876A8
oklch(55.5% 0.093 251.7)
-
Step 700
700
#396390
oklch(49% 0.087 251.5)
-
Step 800
800
#2F5175
oklch(42.6% 0.072 251.1)
-
Step 900
900
#2A435F
oklch(37.6% 0.057 252.1)
-
Step 950
950 (this color)
#0D1B2A
oklch(21.8% 0.036 251.3)
#0D1B2A 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) | #151C2B | 0.013 |
| Deuteranopia (no green cones) | #11192A | 0.009 |
| Tritanopia (no blue cones) | #001E20 | 0.031 |
| Achromatopsia (no color) | #1A1A1A | 0.036 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0D1B2A
#0D1B2A
oklch(21.8% 0.036 251.3)
- #241706
#241706
oklch(21.7% 0.036 72.2)
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 #0D1B2A, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.041
- Jet #212529 ΔE 0.052
- Rich Navy #001219 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.052
- Navy Blue #001146 ΔE 0.068
- Almost Black #070D0D ΔE 0.072
- Dark Navy #000435 ΔE 0.084
- Space Cadet #2B2D42 ΔE 0.089
Use #0D1B2A 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.