#403F34
Closest named color: Charcoal Grey (#3C4142). oklch(36.5% 0.018 103), rgb(64, 63, 52).
Aa
White text reads best on this color (10.61:1).
About this color
#403F34 is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.018. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.022 away. White text reads best on it, at 10.61:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.018) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.97:1 |
| White text | 10.61:1 |
Values
| HEX | #403F34 |
| RGB | rgb(64, 63, 52) |
| HSL | hsl(55, 10%, 23%) |
| OKLCH | oklch(36.5% 0.018 103) |
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 #403F34 | 10.61:1 | AAA | Lc -98.6 | Preferred for body text |
| Black text on #403F34 | 1.97:1 | Fails | Lc 9.3 | Not readable |
| #403F34 text on white | 10.61:1 | AAA | Lc 94.6 | Preferred for body text |
| #403F34 text on black | 1.97:1 | Fails | Lc -8.0 | 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
#F5F5F4
oklch(97% 0.001 106.4)
-
Step 100
100
#EAEAE7
oklch(93.6% 0.004 106.5)
-
Step 200
200
#DAD9D4
oklch(88.5% 0.007 97.4)
-
Step 300
300
#C2C1B7
oklch(80.9% 0.014 102.1)
-
Step 400
400
#A3A192
oklch(70.6% 0.021 100.7)
-
Step 500
500
#8C8A77
oklch(63% 0.028 102.2)
-
Step 600
600
#767460
oklch(55.5% 0.03 102.6)
-
Step 700
700
#63624F
oklch(49.1% 0.029 104.9)
-
Step 800
800
#515041
oklch(42.8% 0.024 104.2)
-
Step 900
900 (this color)
#403F34
oklch(36.5% 0.018 103)
-
Step 950
950
#272720
oklch(27% 0.013 107.2)
#403F34 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) | #413E33 | 0.003 |
| Deuteranopia (no green cones) | #423F34 | 0.003 |
| Tritanopia (no blue cones) | #423D3C | 0.017 |
| Achromatopsia (no color) | #3E3E3E | 0.018 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403F34
#403F34
oklch(36.5% 0.018 103)
- #3D3D48
#3D3D48
oklch(36.4% 0.019 285.4)
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 #403F34, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.022
- Onyx #343A40 ΔE 0.036
- Charcoal #264653 ΔE 0.057
- Dark Slate Gray #2F4F4F ΔE 0.057
- Dark Olive #373E02 ΔE 0.063
- Pakistan Green #283618 ΔE 0.065
- Dark Blue Grey #1F3B4D ΔE 0.066
- Dark Grey Blue #29465B ΔE 0.067
Use #403F34 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.