#1D231B
Closest named color: Jet (#212529). oklch(24.7% 0.017 137.9), rgb(29, 35, 27).
Aa
White text reads best on this color (16.04:1).
About this color
#1D231B is a very dark close to neutral grey. In OKLCH its lightness is 25%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Jet (#212529), ΔE 0.027 away. White text reads best on it, at 16.04:1.
| Hue family | Neutrals |
| Lightness | very dark (25%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Jet (#212529) |
| Black text | 1.30:1 |
| White text | 16.04:1 |
Values
| HEX | #1D231B |
| RGB | rgb(29, 35, 27) |
| HSL | hsl(105, 13%, 12%) |
| OKLCH | oklch(24.7% 0.017 137.9) |
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 #1D231B | 16.04:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #1D231B | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #1D231B text on white | 16.04:1 | AAA | Lc 103.0 | Preferred for body text |
| #1D231B text on black | 1.30:1 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E8EBE7
oklch(93.7% 0.006 137.8)
-
Step 200
200
#D6DBD4
oklch(88.6% 0.011 136.6)
-
Step 300
300
#BAC4B7
oklch(80.9% 0.021 138.4)
-
Step 400
400
#97A692
oklch(70.8% 0.033 137.8)
-
Step 500
500
#7D9077
oklch(63.1% 0.043 138.2)
-
Step 600
600
#677A60
oklch(55.6% 0.045 137.3)
-
Step 700
700
#55674F
oklch(49.2% 0.043 137.9)
-
Step 800
800
#465441
oklch(42.8% 0.035 137.5)
-
Step 900
900
#3B4537
oklch(37.7% 0.027 136.8)
-
Step 950
950 (this color)
#1D231B
oklch(24.7% 0.017 137.9)
#1D231B 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) | #24221B | 0.013 |
| Deuteranopia (no green cones) | #23211B | 0.012 |
| Tritanopia (no blue cones) | #1D2221 | 0.013 |
| Achromatopsia (no color) | #212121 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #1D231B
#1D231B
oklch(24.7% 0.017 137.9)
- #241E26
#241E26
oklch(24.5% 0.017 317.6)
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 #1D231B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Jet #212529 ΔE 0.027
- Dark #1B2431 ΔE 0.041
- Dark Brown #341C02 ΔE 0.052
- Rich Black #0D1B2A ΔE 0.054
- Oxford Blue #1B263B ΔE 0.058
- Dark Forest Green #002D04 ΔE 0.067
- Very Dark Green #062E03 ΔE 0.067
- Pakistan Green #283618 ΔE 0.074
Use #1D231B 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.