#231C28
Closest named color: Dark (#1B2431). oklch(24% 0.025 310.9), rgb(35, 28, 40).
Aa
White text reads best on this color (16.55:1).
About this color
#231C28 is a very dark close to neutral grey. In OKLCH its lightness is 24%, its chroma 0.025. It has too little chroma to lean warm or cool. The nearest named color is Dark (#1B2431), ΔE 0.030 away. White text reads best on it, at 16.55:1.
| Hue family | Neutrals |
| Lightness | very dark (24%) |
| Chroma | close to neutral grey (0.025) |
| Temperature | neutral |
| Nearest name | Dark (#1B2431) |
| Black text | 1.26:1 |
| White text | 16.55:1 |
Values
| HEX | #231C28 |
| RGB | rgb(35, 28, 40) |
| HSL | hsl(275, 18%, 13%) |
| OKLCH | oklch(24% 0.025 310.9) |
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 #231C28 | 16.55:1 | AAA | Lc -105.9 | Preferred for body text |
| Black text on #231C28 | 1.26:1 | Fails | Lc 0.0 | Not readable |
| #231C28 text on white | 16.55:1 | AAA | Lc 103.5 | Preferred for body text |
| #231C28 text on black | 1.26:1 | 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
#F6F5F7
oklch(97.1% 0.003 308.4)
-
Step 100
100
#ECE8EE
oklch(93.6% 0.009 314.8)
-
Step 200
200
#DCD6E1
oklch(88.4% 0.016 310.1)
-
Step 300
300
#C7BCCF
oklch(81% 0.029 311.3)
-
Step 400
400
#AA99B7
oklch(70.8% 0.047 310.5)
-
Step 500
500
#9580A5
oklch(63.2% 0.059 310.3)
-
Step 600
600
#806990
oklch(55.7% 0.065 311.1)
-
Step 700
700
#6C577A
oklch(49.1% 0.06 311.4)
-
Step 800
800
#584763
oklch(42.7% 0.05 311.8)
-
Step 900
900
#483C51
oklch(37.7% 0.038 310.4)
-
Step 950
950 (this color)
#231C28
oklch(24% 0.025 310.9)
#231C28 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) | #1A1E29 | 0.017 |
| Deuteranopia (no green cones) | #1C1F28 | 0.016 |
| Tritanopia (no blue cones) | #231D20 | 0.017 |
| Achromatopsia (no color) | #1F1F1F | 0.025 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #231C28
#231C28
oklch(24% 0.025 310.9)
- #1B2215
#1B2215
oklch(24.1% 0.026 131.1)
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 #231C28, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark #1B2431 ΔE 0.030
- Jet #212529 ΔE 0.031
- Rich Black #0D1B2A ΔE 0.039
- Oxford Blue #1B263B ΔE 0.043
- Space Cadet #2B2D42 ΔE 0.068
- Dark Brown #341C02 ΔE 0.069
- Eggplant #380835 ΔE 0.073
- Aubergine #3D0734 ΔE 0.078
Use #231C28 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.