#0A1D22
Closest named color: Rich Black (#0D1B2A). oklch(21.7% 0.027 217.1), rgb(10, 29, 34).
Aa
White text reads best on this color (17.33:1).
About this color
#0A1D22 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.027. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.020 away. White text reads best on it, at 17.33:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.027) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.21:1 |
| White text | 17.33:1 |
Values
| HEX | #0A1D22 |
| RGB | rgb(10, 29, 34) |
| HSL | hsl(193, 55%, 9%) |
| OKLCH | oklch(21.7% 0.027 217.1) |
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 #0A1D22 | 17.33:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #0A1D22 | 1.21:1 | Fails | Lc 0.0 | Not readable |
| #0A1D22 text on white | 17.33:1 | AAA | Lc 104.1 | Preferred for body text |
| #0A1D22 text on black | 1.21:1 | 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
#F2F6F7
oklch(97% 0.004 214.3)
-
Step 100
100
#E3EBEE
oklch(93.5% 0.009 222.1)
-
Step 200
200
#CDDCE1
oklch(88.5% 0.018 219.7)
-
Step 300
300
#ABC6CE
oklch(80.9% 0.031 217.5)
-
Step 400
400
#7DA9B5
oklch(70.7% 0.05 216.4)
-
Step 500
500
#5A93A3
oklch(63% 0.064 217.7)
-
Step 600
600
#3E7D8E
oklch(55.5% 0.07 217.7)
-
Step 700
700
#2F6A79
oklch(49.2% 0.065 216.9)
-
Step 800
800
#285662
oklch(42.6% 0.054 217.1)
-
Step 900
900
#264750
oklch(37.7% 0.042 217.4)
-
Step 950
950 (this color)
#0A1D22
oklch(21.7% 0.027 217.1)
#0A1D22 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) | #1A1C22 | 0.024 |
| Deuteranopia (no green cones) | #161922 | 0.022 |
| Tritanopia (no blue cones) | #001F1F | 0.016 |
| Achromatopsia (no color) | #1A1A1A | 0.027 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #0A1D22
#0A1D22
oklch(21.7% 0.027 217.1)
- #251611
#251611
oklch(21.9% 0.027 39.2)
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 #0A1D22, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.020
- Dark #1B2431 ΔE 0.045
- Rich Navy #001219 ΔE 0.049
- Jet #212529 ΔE 0.049
- Oxford Blue #1B263B ΔE 0.060
- Almost Black #070D0D ΔE 0.067
- Navy Blue #001146 ΔE 0.086
- Dark Brown #341C02 ΔE 0.087
Use #0A1D22 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.