#403941
Closest named color: Onyx (#343A40). oklch(35.5% 0.017 322), rgb(64, 57, 65).
Aa
White text reads best on this color (11.17:1).
About this color
#403941 is a dark close to neutral grey. In OKLCH its lightness is 35%, its chroma 0.017. It has too little chroma to lean warm or cool. The nearest named color is Onyx (#343A40), ΔE 0.021 away. White text reads best on it, at 11.17:1.
| Hue family | Neutrals |
| Lightness | dark (35%) |
| Chroma | close to neutral grey (0.017) |
| Temperature | neutral |
| Nearest name | Onyx (#343A40) |
| Black text | 1.87:1 |
| White text | 11.17:1 |
Values
| HEX | #403941 |
| RGB | rgb(64, 57, 65) |
| HSL | hsl(293, 7%, 24%) |
| OKLCH | oklch(35.5% 0.017 322) |
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 #403941 | 11.17:1 | AAA | Lc -99.6 | Preferred for body text |
| Black text on #403941 | 1.87:1 | Fails | Lc 8.1 | Not readable |
| #403941 text on white | 11.17:1 | AAA | Lc 95.8 | Preferred for body text |
| #403941 text on black | 1.87:1 | 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
#DBD8DC
oklch(88.6% 0.006 317.8)
-
Step 300
300
#C4BEC5
oklch(80.8% 0.012 321.3)
-
Step 400
400
#A79DA8
oklch(70.8% 0.019 323)
-
Step 500
500
#918593
oklch(63.2% 0.025 321.4)
-
Step 600
600
#7B6E7D
oklch(55.5% 0.028 321.7)
-
Step 700
700
#685C6A
oklch(49.1% 0.027 321.4)
-
Step 800
800
#554B56
oklch(42.7% 0.022 323.1)
-
Step 900
900 (this color)
#403941
oklch(35.5% 0.017 322)
-
Step 950
950
#29252A
oklch(27.1% 0.011 319.5)
#403941 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) | #383B41 | 0.014 |
| Deuteranopia (no green cones) | #3A3B41 | 0.012 |
| Tritanopia (no blue cones) | #403A3C | 0.010 |
| Achromatopsia (no color) | #3B3B3B | 0.017 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #403941
#403941
oklch(35.5% 0.017 322)
- #373E36
#373E36
oklch(35.5% 0.017 141.7)
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 #403941, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Onyx #343A40 ΔE 0.021
- Charcoal Grey #3C4142 ΔE 0.026
- Gunmetal #293241 ΔE 0.047
- Dark Blue Grey #1F3B4D ΔE 0.050
- Charcoal #264653 ΔE 0.053
- Dark Grey Blue #29465B ΔE 0.057
- Space Cadet #2B2D42 ΔE 0.057
- Midnight Green #073B4C ΔE 0.068
Use #403941 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.