#23181E
Closest named color: Rich Black (#0D1B2A). oklch(22.5% 0.021 345), rgb(35, 24, 30).
Aa
White text reads best on this color (17.20:1).
About this color
#23181E is a very dark close to neutral grey. In OKLCH its lightness is 23%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.043 away. White text reads best on it, at 17.20:1.
| Hue family | Neutrals |
| Lightness | very dark (23%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.22:1 |
| White text | 17.20:1 |
Values
| HEX | #23181E |
| RGB | rgb(35, 24, 30) |
| HSL | hsl(327, 19%, 12%) |
| OKLCH | oklch(22.5% 0.021 345) |
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 #23181E | 17.20:1 | AAA | Lc -106.4 | Preferred for body text |
| Black text on #23181E | 1.22:1 | Fails | Lc 0.0 | Not readable |
| #23181E text on white | 17.20:1 | AAA | Lc 104.1 | Preferred for body text |
| #23181E text on black | 1.22:1 | 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
#F7F4F6
oklch(97% 0.004 337.4)
-
Step 100
100
#EEE8EB
oklch(93.7% 0.008 345.4)
-
Step 200
200
#E0D6DB
oklch(88.6% 0.013 345.5)
-
Step 300
300
#CDBBC4
oklch(81% 0.024 345.9)
-
Step 400
400
#B397A6
oklch(70.6% 0.039 344.7)
-
Step 500
500
#A07E90
oklch(63.1% 0.049 345.5)
-
Step 600
600
#8B677B
oklch(55.7% 0.054 344.6)
-
Step 700
700
#765567
oklch(49% 0.051 345.2)
-
Step 800
800
#604654
oklch(42.7% 0.041 345.5)
-
Step 900
900
#4F3B46
oklch(37.8% 0.033 344.6)
-
Step 950
950 (this color)
#23181E
oklch(22.5% 0.021 345)
#23181E 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) | #191A1E | 0.021 |
| Deuteranopia (no green cones) | #1B1C1E | 0.020 |
| Tritanopia (no blue cones) | #25181A | 0.009 |
| Achromatopsia (no color) | #1B1B1B | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #23181E
#23181E
oklch(22.5% 0.021 345)
- #131F19
#131F19
oklch(22.6% 0.021 162.4)
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 #23181E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.043
- Jet #212529 ΔE 0.044
- Dark #1B2431 ΔE 0.047
- Dark Brown #341C02 ΔE 0.061
- Oxford Blue #1B263B ΔE 0.062
- Rich Navy #001219 ΔE 0.073
- Dark Maroon #3C0008 ΔE 0.075
- Eggplant #380835 ΔE 0.078
Use #23181E 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.