#231F2B
Closest named color: Dark (#1B2431). oklch(24.9% 0.023 300), rgb(35, 31, 43).
Aa
White text reads best on this color (16.12:1).
About this color
#231F2B is a very dark close to neutral grey. In OKLCH its lightness is 25%, its chroma 0.023. It has too little chroma to lean warm or cool. The nearest named color is Dark (#1B2431), ΔE 0.021 away. White text reads best on it, at 16.12:1.
| Hue family | Neutrals |
| Lightness | very dark (25%) |
| Chroma | close to neutral grey (0.023) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.30:1 |
| White text | 16.12:1 |
Values
| HEX | #231F2B |
| RGB | rgb(35, 31, 43) |
| HSL | hsl(260, 16%, 15%) |
| OKLCH | oklch(24.9% 0.023 300) |
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 #231F2B | 16.12:1 | AAA | Lc -105.6 | Preferred for body text |
| Black text on #231F2B | 1.30:1 | Fails | Lc 0.0 | Not readable |
| #231F2B text on white | 16.12:1 | AAA | Lc 103.1 | Preferred for body text |
| #231F2B 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
#F6F5F8
oklch(97.2% 0.004 301.4)
-
Step 100
100
#EAE9EE
oklch(93.6% 0.007 295.4)
-
Step 200
200
#DAD7E2
oklch(88.5% 0.015 298.5)
-
Step 300
300
#C3BDD0
oklch(80.9% 0.027 300.2)
-
Step 400
400
#A49BB8
oklch(70.7% 0.043 299.5)
-
Step 500
500
#8E82A7
oklch(63% 0.056 299.6)
-
Step 600
600
#796B92
oklch(55.6% 0.062 300.9)
-
Step 700
700
#655A7C
oklch(49.1% 0.055 299.2)
-
Step 800
800
#534965
oklch(42.7% 0.047 300.8)
-
Step 900
900
#443D52
oklch(37.6% 0.036 299.9)
-
Step 950
950 (this color)
#231F2B
oklch(24.9% 0.023 300)
#231F2B 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) | #1D212C | 0.012 |
| Deuteranopia (no green cones) | #1D212B | 0.012 |
| Tritanopia (no blue cones) | #222123 | 0.019 |
| Achromatopsia (no color) | #212121 | 0.023 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231F2B
#231F2B
oklch(24.9% 0.023 300)
- #202317
#202317
oklch(24.9% 0.022 119.4)
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 #231F2B, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.021
- Jet #212529 ΔE 0.023
- Oxford Blue #1B263B ΔE 0.034
- Rich Black #0D1B2A ΔE 0.041
- Space Cadet #2B2D42 ΔE 0.059
- Gunmetal #293241 ΔE 0.069
- Dark Brown #341C02 ΔE 0.070
- Eggplant #380835 ΔE 0.076
Use #231F2B 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.