#403631
Closest named color: Onyx (#343A40). oklch(34.2% 0.017 48.2), rgb(64, 54, 49).
Aa
White text reads best on this color (11.73:1).
About this color
#403631 is a dark close to neutral grey. In OKLCH its lightness is 34%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.030 away. White text reads best on it, at 11.73:1.
| Hue family | Neutrals |
| Lightness | dark (34%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.79:1 |
| White text | 11.73:1 |
Values
| HEX | #403631 |
| RGB | rgb(64, 54, 49) |
| HSL | hsl(20, 13%, 22%) |
| OKLCH | oklch(34.2% 0.017 48.2) |
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 #403631 | 11.73:1 | AAA | Lc -100.6 | Preferred for body text |
| Black text on #403631 | 1.79:1 | Fails | Lc 0.0 | Not readable |
| #403631 text on white | 11.73:1 | AAA | Lc 97.0 | Preferred for body text |
| #403631 text on black | 1.79:1 | 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 900.
-
Step 50
50
#F6F5F4
oklch(97.1% 0.002 67.8)
-
Step 100
100
#ECE9E8
oklch(93.6% 0.004 39.5)
-
Step 200
200
#DDD8D5
oklch(88.5% 0.007 53.4)
-
Step 300
300
#C8BEBA
oklch(80.9% 0.013 43.3)
-
Step 400
400
#AC9D96
oklch(70.7% 0.02 46.7)
-
Step 500
500
#97857C
oklch(63% 0.026 48.3)
-
Step 600
600
#826F65
oklch(55.7% 0.028 49.5)
-
Step 700
700
#6E5D54
oklch(49.2% 0.026 49.6)
-
Step 800
800
#594C45
oklch(42.7% 0.021 50.1)
-
Step 900
900 (this color)
#403631
oklch(34.2% 0.017 48.2)
-
Step 950
950
#2B2522
oklch(27% 0.011 48.3)
#403631 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) | #393731 | 0.013 |
| Deuteranopia (no green cones) | #3B3931 | 0.013 |
| Tritanopia (no blue cones) | #433435 | 0.012 |
| Achromatopsia (no color) | #383838 | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403631
#403631
oklch(34.2% 0.017 48.2)
- #303A3F
#303A3F
oklch(34.1% 0.016 229.5)
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 #403631, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.030
- Charcoal Grey #3C4142 ΔE 0.037
- Gunmetal #293241 ΔE 0.052
- Pakistan Green #283618 ΔE 0.061
- Space Cadet #2B2D42 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.063
- Charcoal #264653 ΔE 0.069
- Dark Olive #373E02 ΔE 0.074
Use #403631 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.