#403F36
Closest named color: Charcoal Grey (#3C4142). oklch(36.6% 0.015 101.9), rgb(64, 63, 54).
Aa
White text reads best on this color (10.59:1).
About this color
#403F36 is a dark close to neutral grey. In OKLCH its lightness is 37%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.019 away. White text reads best on it, at 10.59:1.
| Hue family | Neutrals |
| Lightness | dark (37%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.98:1 |
| White text | 10.59:1 |
Values
| HEX | #403F36 |
| RGB | rgb(64, 63, 54) |
| HSL | hsl(54, 8%, 23%) |
| OKLCH | oklch(36.6% 0.015 101.9) |
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 #403F36 | 10.59:1 | AAA | Lc -98.5 | Preferred for body text |
| Black text on #403F36 | 1.98:1 | Fails | Lc 9.3 | Not readable |
| #403F36 text on white | 10.59:1 | AAA | Lc 94.6 | Preferred for body text |
| #403F36 text on black | 1.98:1 | 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
#DAD9D5
oklch(88.5% 0.006 95.1)
-
Step 300
300
#C2C1B9
oklch(80.9% 0.011 100.9)
-
Step 400
400
#A3A195
oklch(70.7% 0.017 99.1)
-
Step 500
500
#8C8A7A
oklch(63.1% 0.023 101.2)
-
Step 600
600
#767463
oklch(55.6% 0.026 101.7)
-
Step 700
700
#636152
oklch(49% 0.023 100.9)
-
Step 800
800
#515043
oklch(42.8% 0.021 103.6)
-
Step 900
900 (this color)
#403F36
oklch(36.6% 0.015 101.9)
-
Step 950
950
#272721
oklch(27.1% 0.011 107.1)
#403F36 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) | #413E35 | 0.003 |
| Deuteranopia (no green cones) | #413F36 | 0.002 |
| Tritanopia (no blue cones) | #423E3C | 0.012 |
| Achromatopsia (no color) | #3F3F3F | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403F36
#403F36
oklch(36.6% 0.015 101.9)
- #3D3E47
#3D3E47
oklch(36.6% 0.015 280.6)
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 #403F36, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.019
- Onyx #343A40 ΔE 0.034
- Charcoal #264653 ΔE 0.055
- Dark Slate Gray #2F4F4F ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.064
- Dark Blue Grey #1F3B4D ΔE 0.064
- Dark Olive #373E02 ΔE 0.067
- Gunmetal #293241 ΔE 0.067
Use #403F36 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.