#131B24
Closest named color: Rich Black (#0D1B2A). oklch(21.9% 0.021 251.8), rgb(19, 27, 36).
Aa
White text reads best on this color (17.35:1).
About this color
#131B24 is a very dark close to neutral grey. In OKLCH its lightness is 22%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Rich Black (#0D1B2A), ΔE 0.014 away. White text reads best on it, at 17.35:1.
| Hue family | Neutrals |
| Lightness | very dark (22%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Rich Black (#0D1B2A) |
| Black text | 1.20:1 |
| White text | 17.35:1 |
Values
| HEX | #131B24 |
| RGB | rgb(19, 27, 36) |
| HSL | hsl(212, 31%, 11%) |
| OKLCH | oklch(21.9% 0.021 251.8) |
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 #131B24 | 17.35:1 | AAA | Lc -106.5 | Preferred for body text |
| Black text on #131B24 | 1.20:1 | Fails | Lc 0.0 | Not readable |
| #131B24 text on white | 17.35:1 | AAA | Lc 104.2 | Preferred for body text |
| #131B24 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
#F4F6F8
oklch(97.2% 0.003 247.9)
-
Step 100
100
#E6EAEF
oklch(93.5% 0.008 253.9)
-
Step 200
200
#D3DAE2
oklch(88.5% 0.013 251.6)
-
Step 300
300
#B5C2D1
oklch(80.9% 0.026 251.9)
-
Step 400
400
#8FA3BA
oklch(70.8% 0.041 252)
-
Step 500
500
#738CA8
oklch(63.1% 0.051 251.5)
-
Step 600
600
#5B7694
oklch(55.6% 0.057 251.5)
-
Step 700
700
#4B637E
oklch(49.1% 0.052 251.8)
-
Step 800
800
#3E5166
oklch(42.8% 0.042 251.3)
-
Step 900
900
#354353
oklch(37.7% 0.033 252.1)
-
Step 950
950 (this color)
#131B24
oklch(21.9% 0.021 251.8)
#131B24 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) | #181B24 | 0.009 |
| Deuteranopia (no green cones) | #161A24 | 0.006 |
| Tritanopia (no blue cones) | #0D1D1E | 0.019 |
| Achromatopsia (no color) | #1A1A1A | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #131B24
#131B24
oklch(21.9% 0.021 251.8)
- #21190F
#21190F
oklch(22% 0.022 72.5)
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 #131B24, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Rich Black #0D1B2A ΔE 0.014
- Dark #1B2431 ΔE 0.040
- Jet #212529 ΔE 0.045
- Rich Navy #001219 ΔE 0.052
- Oxford Blue #1B263B ΔE 0.055
- Almost Black #070D0D ΔE 0.069
- Navy Blue #001146 ΔE 0.082
- Dark Brown #341C02 ΔE 0.083
Use #131B24 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.