#40383E
Closest named color: Onyx (#343A40). oklch(35.1% 0.015 334.6), rgb(64, 56, 62).
Aa
White text reads best on this color (11.33:1).
About this color
#40383E is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.015. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.020 away. White text reads best on it, at 11.33:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.015) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.85:1 |
| White text | 11.33:1 |
Values
| HEX | #40383E |
| RGB | rgb(64, 56, 62) |
| HSL | hsl(315, 7%, 24%) |
| OKLCH | oklch(35.1% 0.015 334.6) |
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 #40383E | 11.33:1 | AAA | Lc -99.9 | Preferred for body text |
| Black text on #40383E | 1.85:1 | Fails | Lc 7.7 | Not readable |
| #40383E text on white | 11.33:1 | AAA | Lc 96.2 | Preferred for body text |
| #40383E text on black | 1.85:1 | 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
#F6F5F6
oklch(97.1% 0.002 325.6)
-
Step 100
100
#EBE9EB
oklch(93.6% 0.003 325.6)
-
Step 200
200
#DCD8DB
oklch(88.6% 0.006 334)
-
Step 300
300
#C5BEC3
oklch(80.9% 0.01 335.5)
-
Step 400
400
#A89DA5
oklch(70.8% 0.017 335.2)
-
Step 500
500
#93848F
oklch(63% 0.024 335.2)
-
Step 600
600
#7D6E79
oklch(55.6% 0.025 335.3)
-
Step 700
700
#695C66
oklch(49.1% 0.023 333.9)
-
Step 800
800
#564B53
oklch(42.7% 0.019 335.6)
-
Step 900
900 (this color)
#40383E
oklch(35.1% 0.015 334.6)
-
Step 950
950
#292528
oklch(27% 0.008 334.4)
#40383E 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) | #383A3E | 0.015 |
| Deuteranopia (no green cones) | #3A3B3E | 0.014 |
| Tritanopia (no blue cones) | #41383A | 0.007 |
| Achromatopsia (no color) | #3A3A3A | 0.015 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
This color is close to neutral, so it has no meaningful hue to rotate. Hue harmonies are omitted.
Palettes with this color
Curated palettes that contain a color within ΔE 0.04 (OKLab) of #40383E, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.020
- Charcoal Grey #3C4142 ΔE 0.028
- Gunmetal #293241 ΔE 0.046
- Dark Blue Grey #1F3B4D ΔE 0.052
- Charcoal #264653 ΔE 0.056
- Space Cadet #2B2D42 ΔE 0.056
- Dark Grey Blue #29465B ΔE 0.061
- Midnight Green #073B4C ΔE 0.069
Use #40383E 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.