#403C33
Closest named color: Charcoal Grey (#3C4142). oklch(35.7% 0.016 86.9), rgb(64, 60, 51).
Aa
White text reads best on this color (10.98:1).
About this color
#403C33 is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.016. It has too little chroma to lean warm or cool. The nearest named color is Charcoal Grey (#3C4142), ΔE 0.025 away. White text reads best on it, at 10.98:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.016) |
| Temperature | neutral |
| Nearest name | Charcoal Grey (#3C4142) |
| Black text | 1.91:1 |
| White text | 10.98:1 |
Values
| HEX | #403C33 |
| RGB | rgb(64, 60, 51) |
| HSL | hsl(42, 11%, 23%) |
| OKLCH | oklch(35.7% 0.016 86.9) |
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 #403C33 | 10.98:1 | AAA | Lc -99.3 | Preferred for body text |
| Black text on #403C33 | 1.91:1 | Fails | Lc 8.5 | Not readable |
| #403C33 text on white | 10.98:1 | AAA | Lc 95.4 | Preferred for body text |
| #403C33 text on black | 1.91:1 | 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
#EBEAE7
oklch(93.7% 0.004 91.4)
-
Step 200
200
#DBD9D4
oklch(88.5% 0.007 88.6)
-
Step 300
300
#C4C0B8
oklch(80.9% 0.012 84.6)
-
Step 400
400
#A6A093
oklch(70.7% 0.02 86.2)
-
Step 500
500
#908979
oklch(63.2% 0.025 87.2)
-
Step 600
600
#7A7362
oklch(55.7% 0.027 88.3)
-
Step 700
700
#676051
oklch(49.1% 0.025 86)
-
Step 800
800
#544E42
oklch(42.6% 0.021 84.6)
-
Step 900
900 (this color)
#403C33
oklch(35.7% 0.016 86.9)
-
Step 950
950
#292621
oklch(27% 0.01 80.6)
#403C33 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) | #3E3C32 | 0.004 |
| Deuteranopia (no green cones) | #3F3D33 | 0.004 |
| Tritanopia (no blue cones) | #423A39 | 0.014 |
| Achromatopsia (no color) | #3C3C3C | 0.016 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403C33
#403C33
oklch(35.7% 0.016 86.9)
- #393C45
#393C45
oklch(35.7% 0.016 270.9)
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 #403C33, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Charcoal Grey #3C4142 ΔE 0.025
- Onyx #343A40 ΔE 0.031
- Charcoal #264653 ΔE 0.060
- Gunmetal #293241 ΔE 0.062
- Pakistan Green #283618 ΔE 0.062
- Dark Blue Grey #1F3B4D ΔE 0.064
- Dark Slate Gray #2F4F4F ΔE 0.064
- Dark Olive #373E02 ΔE 0.066
Use #403C33 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.