#404C3D
Closest named color: Dark Slate Gray (#2F4F4F). oklch(40.1% 0.029 139.4), rgb(64, 76, 61).
Aa
White text reads best on this color (9.05:1).
About this color
#404C3D is a dark close to neutral grey. In OKLCH its lightness is 40%, its chroma 0.029. It has too little chroma to lean warm or cool. The nearest named color is Dark Slate Gray (#2F4F4F), ΔE 0.032 away. White text reads best on it, at 9.05:1.
| Hue family | Neutrals |
| Lightness | dark (40%) |
| Chroma | close to neutral grey (0.029) |
| Temperature | neutral |
| Nearest name | Dark Slate Gray (#2F4F4F) |
| Black text | 2.31:1 |
| White text | 9.05:1 |
Values
| HEX | #404C3D |
| RGB | rgb(64, 76, 61) |
| HSL | hsl(108, 11%, 27%) |
| OKLCH | oklch(40.1% 0.029 139.4) |
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 #404C3D | 9.05:1 | AAA | Lc -95.2 | Preferred for body text |
| Black text on #404C3D | 2.31:1 | Fails | Lc 13.1 | Not readable |
| #404C3D text on white | 9.05:1 | AAA | Lc 90.8 | Preferred for body text |
| #404C3D text on black | 2.31:1 | Fails | Lc -11.5 | 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
#F4F6F4
oklch(97.1% 0.003 145.5)
-
Step 100
100
#E8EBE7
oklch(93.7% 0.006 137.8)
-
Step 200
200
#D5DBD4
oklch(88.5% 0.011 141.3)
-
Step 300
300
#BAC4B7
oklch(80.9% 0.021 138.4)
-
Step 400
400
#96A692
oklch(70.7% 0.034 139.4)
-
Step 500
500
#7C9077
oklch(63% 0.043 139.4)
-
Step 600
600
#657B5F
oklch(55.7% 0.05 139)
-
Step 700
700
#54674F
oklch(49.1% 0.044 139.2)
-
Step 800
800
#445441
oklch(42.6% 0.037 140.7)
-
Step 900
900 (this color)
#404C3D
oklch(40.1% 0.029 139.4)
-
Step 950
950
#222920
oklch(27.1% 0.019 138.8)
#404C3D 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) | #4D493C | 0.022 |
| Deuteranopia (no green cones) | #4B483E | 0.021 |
| Tritanopia (no blue cones) | #3F4B48 | 0.019 |
| Achromatopsia (no color) | #494949 | 0.029 |
Harmonies
Hue rotations in OKLCH that keep this color's lightness and chroma.
Complementary
The opposite hue (180°).
- #404C3D
#404C3D
oklch(40.1% 0.029 139.4)
- #4F4352
#4F4352
oklch(40.1% 0.029 319.5)
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 #404C3D, closest first.
Similar named colors
The eight closest entries in our named color list, with their ΔE distance.
- Dark Slate Gray #2F4F4F ΔE 0.032
- Charcoal Grey #3C4142 ΔE 0.041
- Dark Blue Green #005249 ΔE 0.053
- Charcoal #264653 ΔE 0.057
- Dark Teal #014D4E ΔE 0.058
- Deep Teal #00555A ΔE 0.062
- Pine #2B5D34 ΔE 0.065
- Dark Grey Blue #29465B ΔE 0.066
Use #404C3D 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.