#403944
Closest named color: Onyx (#343A40). oklch(35.6% 0.021 313.4), rgb(64, 57, 68).
Aa
White text reads best on this color (11.13:1).
About this color
#403944 is a dark close to neutral grey. In OKLCH its lightness is 36%, its chroma 0.021. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.022 away. White text reads best on it, at 11.13:1.
| Hue family | Neutrals |
| Lightness | dark (36%) |
| Chroma | close to neutral grey (0.021) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.88:1 |
| White text | 11.13:1 |
Values
| HEX | #403944 |
| RGB | rgb(64, 57, 68) |
| HSL | hsl(278, 9%, 25%) |
| OKLCH | oklch(35.6% 0.021 313.4) |
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 #403944 | 11.13:1 | AAA | Lc -99.5 | Preferred for body text |
| Black text on #403944 | 1.88:1 | Fails | Lc 8.1 | Not readable |
| #403944 text on white | 11.13:1 | AAA | Lc 95.7 | Preferred for body text |
| #403944 text on black | 1.88:1 | 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
#EBE9EC
oklch(93.6% 0.005 314.8)
-
Step 200
200
#DBD7DD
oklch(88.4% 0.009 314.8)
-
Step 300
300
#C4BEC8
oklch(80.9% 0.015 312.2)
-
Step 400
400
#A69CAC
oklch(70.6% 0.026 313.1)
-
Step 500
500
#908498
oklch(63.1% 0.033 312)
-
Step 600
600
#7B6E82
oklch(55.7% 0.034 313.9)
-
Step 700
700
#675C6E
oklch(49.2% 0.031 312.3)
-
Step 800
800
#544B5A
oklch(42.7% 0.027 311.9)
-
Step 900
900 (this color)
#403944
oklch(35.6% 0.021 313.4)
-
Step 950
950
#29252B
oklch(27.1% 0.012 314.6)
#403944 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) | #383B44 | 0.014 |
| Deuteranopia (no green cones) | #393C44 | 0.015 |
| Tritanopia (no blue cones) | #403A3D | 0.014 |
| Achromatopsia (no color) | #3B3B3B | 0.021 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403944
#403944
oklch(35.6% 0.021 313.4)
- #383F33
#383F33
oklch(35.7% 0.022 132.3)
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 #403944, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.022
- Charcoal Grey #3C4142 ΔE 0.028
- Gunmetal #293241 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.049
- Charcoal #264653 ΔE 0.051
- Dark Grey Blue #29465B ΔE 0.054
- Space Cadet #2B2D42 ΔE 0.056
- Prussian Blue #1D3557 ΔE 0.065
Use #403944 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.